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 Lelo Mia 2 has a very soft power range, which can be good or bad depending on your needs. Its first power starts at 0.1 out of 10 for vibration strength, which is the gentlest of all my bullet vibrators. There are 12 power settings in total, with the top strength reaching only 3.25 out of 10.

This means you have lots of small, incremental power steps to enjoy within that gentle range. Making the Mia 2 a nice option for those who are easily overstimulated and who need lots of soft vibrations without too much intensity. I can orgasm with the top strength of the Mia 2, but it definitely takes some effort.

I like more power personally, and those who want intensity will prefer other options in a comparable price range. For instance, the Lovense Ambi and We-Vibe Touch X each reach closer to an 8 out of 10 on high and begin softly at 1.5 and 2.5 out of 10 on low. So you still have gentler strengths for warming up, but you also have the option to crank up the intensity.

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.

We rate rumbly vibrations higher than buzzy ones because it’s what most people prefer. 

The Lelo Mia 2 has average rumbliness. The low powers are in the rumbly range, but the higher strengths are in the neutral range. Since it has low overall strength, those neutral-feeling higher powers are the ones you’ll likely use most often.

Personal preferences on vibration frequency vary, and I actually really enjoy the Lelo Mia’s neutral vibrations. But if you want the most rumbly option you can find, the We-Vibe Tango X is a great alternative in the same price range.

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.

The Lelo Mia 2 provides a medium amount of precision (purely a personal preference) compared to other bullet and mini vibrators – a hybrid between broad and focused. It has a relatively narrow, rounded tip that provides fairly focused stimulation. But the tip does not come to a fine point like many tapered or lipstick-shaped bullets that provide very precise stimulation.

Likewise, some mini vibrators like the We-Vibe Touch X provide broader stimulation that blankets more of your vulva. But still, you can get somewhat broad stimulation from the Mia 2 by angling it and pressing the side of the bullet against you rather than the tip.

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 Lelo Mia 2 is very comfortable. The Mia is longer than most bullets and has a firm texture making it very easy to grip and leverage for solid pressure.

The Mia has separate buttons to increase and decrease vibration power. This is helpful over the one-button system many bullet vibrators use that requires you to cycle through levels. The buttons take firmer pressure than some, but this means you don’t accidentally adjust the power when you don’t mean to.

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 Lelo Mia 2 is easy to use and effective during sex. The thin design makes it easy to fit into tight spaces. I can easily move the Mia around without the end hitting my partner’s chest.

It’s made of very firm plastic, which can bump around a bit in missionary or other positions where your partner may occasionally press the toy against you. It’s small enough that it does not cause discomfort, but if you’d prefer something more plush, the Dame Pom is very squishy and flexible. But I think most people will not be bothered by the firmness of the Mia’s tip.

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 Lelo Mia 2 is one of my quietest bullets and cannot be heard from behind a closed door at all. But this is primarily because it’s a low-powered bullet vibrator that’s best for those who need gentle vibrations.

If you prefer intense vibrations, there are more powerful bullet and mini vibrators that are also discreet. The We-Vibe Touch X and Lovense Ambi are two much stronger options that are also entirely inaudible behind a closed door.

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 Lelo Mia 2 is rechargeable and lasts for an hour and a half on its highest power. This is long for a bullet. However, since its max setting is actually quite gentle, the battery life isn’t too impressive since it doesn’t use much power.

If you want more powerful bullets that last about the same time on their highest power, the We-Vibe Tango X and We-Vibe Touch X are excellent options. They’ll last even longer if you also tend to use some gentle settings part of the time.

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 Lelo Mia 2 has a decent build quality. I haven’t experienced any issues with it, but its extremely lightweight plastic construction feels somewhat cheap. The buttons also take some firm pressure to press. It just doesn’t feel as luxurious as some other premium bullet vibrators.

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 Lelo Mia 2 is completely IPX7 waterproof, which makes it very easy to clean. You can completely submerge it in water while you’re scrubbing with soap and water – absolutely no worries.