The FemmeFunn Booster Bullet is one of my strongest bullet vibrators and has a good range between low and high. 

I don’t consider many bullet vibrators’ top strength “extreme,” but the Booster Bullet is one I do. 

It reaches a 9.5 out of 10 on its top power level. I never need to use this setting because even the second level is intense. The Booster Bullet has about 5% more power than the cheaper FemmeFunn Ultra Bullet – though the Ultra’s 9 out of 10 top power is strong enough for most people. Depending on your budget, it might be worth saving the $20 going with the Ultra Bullet for the minimal difference.

There are better choices than the FemmeFunn Booster Bullet for those who need mild stimulation. Its lowest power is 4.75 out of 10 strength – it begins with a fair amount of power. If you need more gentle settings consider the Lovense Ambi or BMS Swan Maximum if you like buzzy vibrations. Or the We-Vibe Tango X if you prefer rumbly vibrations.

As someone who enjoys moderate to intense vibrations but nothing too extreme, I find the Booster Bullet’s starting level perfect as a warm-up. I spend a lot of time with it because you can vary how intense it feels by applying more or less pressure. Or by changing how direct the stimulation is on your clit.

Then, when I switch to the second power level, I’m ready for its strength and don’t find it overwhelming. This setting is around my ideal strength to finish.

The BMS Swan Maximum Bullet has the strongest top power of all my bullet vibrators, reaching an 11 out of 10 strength. You read that right—an 11. The Swan Maximum was released after my first round of bullet vibrator testing, but it beat out my previous most powerful bullets, the Blush Limited Addiction and Doxy Bullet, which I had rated 10!

The BMS Swan Maximum’s 11/10 power is stronger than I could ever need. In fact, without the silicone grip that comes with the bullet, its top setting is too strong to hold in my hand!

Thankfully, it also has the widest power range of my bullets (another benefit over the Blush Limited Addiction and Doxy Bullet), starting at just a 2.5 out of 10 vibration strength. So, it has plenty of milder settings if you prefer gentle to moderate stimulation.

The press-and-hold buttons also let you gradually increase and decrease intensity in tiny steps. With such a comprehensive power range, most people will find some intensity levels they enjoy.

We rate rumbly vibrators higher than buzzy ones because it’s what most people prefer. But others prefer buzzy vibrators, so go with what you like! 

The FemmeFunn Booster Bullet is buzzy. Only the lowest power level is in the rumbly range. The two highest settings are moderately and extremely buzzy. This buzziness makes the already powerful vibrations feel even more intense.

I personally enjoy the Booster Bullet’s buzzy vibrations – it’s one of my favorites. But those who want deep, rumbly vibrations will want to go with the We-Vibe Tango X instead. It’s the most rumbly bullet I’ve tried. Although not quite as strong as the Booster Bullet, it will be enough strength for many people. 

Vibrations typically become buzzier the stronger they get. None of the bullets I’ve tested that have extreme strength like the FemmeFunn Booster Bullet are rumbly. So consider whether you value rumbliness or intensity more.

The BMS Swan Maximum’s vibrations are primarily buzzy. The lowest power levels are moderately rumbly, which is a nice, gentle intro. But by the time you reach settings with moderate strength, the vibrations feel neutral. And they quickly become buzzy as you increase the intensity higher.

Whether this is good or bad depends on your preferences. Some people prefer buzzy vibrations, whereas others want rumbly (low-frequency) vibes.

Since I prefer moderate intensity, I only need to use the first half of the Swan Maximum’s power levels – so I typically use those rumbly and neutral vibes. But if you’re interested in those extremely intense top settings, you have to love buzzy vibrations.

However, none of my rumbly bullet vibrators come close to the Swan Maximum’s vibration power. The We-Vibe Tango X is my strongest rumbly bullet, reaching a top strength of 7.75.

When it comes to bullet vibrators, you generally need to choose between more power or more rumbliness. If strong, rumbly vibrations are your priority, a wand vibrator like the Lovense Domi 2 or BMS Swan Era Wand is better. Because wand vibrators’ motors are heavier, they’re often both rumbly and strong.

The FemmeFunn Booster Bullet is neither broad nor particularly focused – it’s a happy medium. The relatively wide tip (nearly an inch) is broader than many bullets with a typical lipstick or tapered shape. And it’s rounded, making it feel broader too. This makes it comfortable for firm pressure because it’s more evenly distributing that weight instead of feeling pokey.

But it’s still narrower than several bullets and other mini vibrators like the We-Vibe Touch X. The tip is small enough to isolate vibrations to a reasonably small area, or you can use the side of the bullet to spread that out and cover a bit more space.

Whether you prefer broad or focused stimulation is up to your personal preference.

The BMS Swan Maximum Bullet provides a versatile experience because you can use the thin lipstick tip (just 0.75 inches wide) for very precise contact. But you can also press the side of the bullet to your body to cover more area for those who prefer to spread the stimulation out more.

The FemmeFunn Booster Bullet is very comfortable, and the buttons provide good control.

The length is excellent for maneuvering without taking up too much space or cramping your fingers. The form is flexible, which makes it comfortable to press against your body. This flexibility means you need to shift your fingers and use them to press closer to the tip if you want extra-firm pressure rather than leveraging it from the base as you would with a rigid bullet.

The vibrations travel into your fingers a bit when using them to press near the tip (where the motor is located) for extra pressure, but it’s nothing too distracting.

You cycle through the 3 intensity levels and 17 patterns using a single button on the bullet’s base. This is less convenient than bullets that let you toggle forward and backward with separate buttons, like the We-Vibe Tango X. Still, the Booster Bullet is more advanced than other cycling bullets because of the Boost button and memory system.

The Boost button lets you quickly jump from wherever you are in the cycle to the top steady intensity level. So basically, whenever you’re on the edge, tap the Boost button to take you the rest of the way. In addition to the slight power increase, the Boost button is this bullet’s other upgrade over the FemmeFunn Ultra Bullet. If it doesn’t seem worthwhile to you, you can save some money and get the Ultra.

The Booster Bullet also has a built-in memory system (as does the Ultra Bullet). The next time you use the bullet, it will pick up at your most recent setting. That way, if you have a favorite setting, you won’t need to cycle through all the patterns to find it again. 

And for those who prefer warming up on the gentlest setting, the next click of the button will take you directly to the lowest constant power level.

The BMS Swan Maximum Bullet is very easy to use, but it has some uncomfortable aspects.

It has great controls with two press-and-hold buttons that let you increase and decrease power continuously – there are no jumps between settings. Simply hold the increase or decrease power button, and the Swan Maximum will gradually change power. This control system makes finding the exact power level you need easy.

Some other bullet vibrators, like the Pillow Talk Racy and Flirty, have a similar continuous system. But these bullets have just one button, so you can only increase power gradually. To decrease power, you have to turn them off and on again to start over. So, the BMS Swan Maximum’s second button is helpful.

I personally find the Swan Maximum’s buttons take firm pressure to hold down, which is tiring if you change power often. The Pillow Talk Racy’s button is easier to press. And if you don’t need super tiny power adjustments, ordinary clickable buttons like those of the Blush Limited Addiction are fine. But the Swan’s two press-and-hold buttons have their benefits in finding your ideal strength.

The BMS Swan is only adequately comfortable. The bullet is shorter than I prefer, and the base tapers inward, forcing you to grip it toward the middle of the bullet. This makes the usable length even shorter, causes my fingers to feel cramped in a tight space, and doesn’t provide as much leverage as longer bullets.

The Swan Maximum’s vibrations travel into my hand, too. They’re comfortable at low to medium power levels, but they’re distracting at the top half of the settings. The silicone Comfy Cuff that comes with it is a must if you plan to use the higher powers—it helps dampen the vibrations in your fingers but doesn’t completely eliminate them.

The Blush Limited Addiction is another extremely powerful bullet with less (but not zero) vibrations in your hand. With very powerful bullet vibrators, your fingers are close to the motor since bullets are tiny. So, if you’re particularly sensitive to vibrations in your fingers, try a mid-sized toy like the Lovense Hyphy or a small wand vibrator like the Lovense Domi 2.

This bullet works amazingly well during sex. It’s a great size to slip into tight spaces without taking up much room or bumping against your partner. Its round tip and flexible form make it especially comfortable, even with heavy movement during sex. It flexes with your body to remain in comfortable contact with your clit (directly or indirectly). 

It’s also a reasonably long bullet, so I don’t need to keep my hands too far down during sex.

The BMS Swan Maximum is excellent to use during sex. Its small size and tapered tip make it easy to fit into tight spaces. And since it can reach very high powers, it provides plenty of stimulation.

If you’re not using the silicone cuff to dampen the vibrations that travel into your hand, you can use it to attach the bullet to your fingers. That way, you can maneuver and press the bullet to your body without gripping it. While it’s not completely hands-free, like some couples vibrators, it’s minimal effort.

This can make it easier to hold during sex. Though, I can only tolerate using it this way on the low to medium levels (which have plenty of strength for me). If I use the Swan Maximum’s highest levels, I need to use the Comfy Cuff to dampen the vibrations instead.

The FemmeFunn Booster Bullet has good, quiet noise levels. Our decibel readings were lower than the average bullet – this is especially impressive considering it’s one of the most powerful I’ve tested.

We also test whether someone would hear the bullet on the other side of a closed door. My partner stands directly on the other side of the door while I use the bullet in the bedroom.

The first two power levels were completely inaudible, but my partner could just barely hear it on the highest setting. This is the note he left in our testing spreadsheet word for word:

“This was just barely perceptible on high. I had to try really hard and wait for sounds outside to become extremely quiet. I doubt anyone would actually hear in typical use.”

Turning on a box fan or music solves this problem completely, so you can use this to mask the noise if you want to use all power levels.

The BMS Swan Maximum Bullet has good noise levels, considering its enormous power.

When I used it in the bedroom, my partner could only hear it on the highest settings from the other side of the bedroom door. We also found that he could only hear the Swan Maximum when the bullet accidentally brushed up against the comforter on my bed, which made a louder sound. When I kept the vibrator pressed to my body, he couldn’t hear it on the highest setting.

If you’re concerned about noise, stick to the medium power levels, which are still quite powerful. You can also turn on music or a fan to mask the noise.

The FemmeFunn Booster Bullet is rechargeable and lasted 85 minutes on high power during our testing. It has the longest battery life of my “extremely powerful” bullets. And if you also use the lower or middle powers occasionally, you’ll prolong the lifespan even more.

The BMS Swan Maximum Bullet has an amazing battery life. After charging it fully, I ran it on its highest power until it died – 139 minutes later. It lasted longer than any of the other bullets I’ve tested so far.

This was especially surprising since extremely powerful vibrators often die faster (since they use more power). All the bullet and mini vibrators that come close to the Swan Maximum’s battery life are substantially weaker.

The FemmeFunn Booster Bullet has excellent build quality. The body-safe silicone is smooth and comfortable. The ABS Plastic housing the motor also feels solid. It has some good weight, making it feel more durable than cheap, lightweight bullets. The silicone buttons also feel well-made. 

The flexible part is a little squeaky, which is not as luxurious as I would hope, but it hasn’t caused me any issues. I’m comfortable applying firm pressure without worrying about damaging the bullet.

The BMS Swan Maximum Bullet has a good build quality but is not luxurious. The ABS Plastic has a nice, metallic look and feels well-made, but it shows scratches easily. It seems durable but feels lighter than I expected due to the metallic look. Bullet vibrators actually made of metal, like the Le Wand Grand Bullet, are heavier and feel more solid.

The silicone buttons have a nice feel, and the detachable silicone grip is very plush. I wish the grip was wider to cover more surface area since the vibrations travel easily into my fingers, but it still does the trick well enough.

Since the Booster Bullet is entirely waterproof, it’s very easy to clean. You can completely submerge it while scrubbing it with soap and water. No worrying about damaging the toy.

The BMS Swan Maximum Bullet is IPX7 waterproof, so it’s very easy to clean. You can fully submerge it while scrubbing or use it in the bathtub.