This is such a solid little tooth brush for the money -- I got mine for a little cheaper because I opted to get the lilac/purple colored one; isn't it funny how just the color of an item will drastically change its price? (we see you Amazon)Anyhow, I didn't care much about the color as much as I cared about my teeth, and I will say that I love this little brush. I haven't traveled with it yet to confirm its battery life, as for now it basically lives on the charger where I put it after use. The brush connects via blue-tooth to your phone where it records your brushing habits and even awards you points for brushing that you can use in the in-app store to purchase more brushing heads, toothpaste and other related things. So in essence, you never have to buy another brush head again if you brush consistently.I actually also enjoy the 'guided brushing' option on the app, which is just a visual representation of where you're brushing and I think this is an excellent tool for kids, which helps to develop good brushing habits!I recommend this brush.This toothbrush is great. I have brought prior versions of different electrical toothbrushes from other companies. Some were relatively expensive others were not. I ended up giving them all away because I did not like the noise or the way they felt as I was brushing my teeth. This toothbrush (at least for me) was a game changer. I am able to have a setting that is gentle on my teeth as I use it and the minor noise does not bother me. So, if you have had similar experiences to mine give this toothbrush a try. I have not regretted it.I purchased the battery operated one so much that I decided to get this rechargeable one as well.It has an additional deep cleaning mode over and above the two (regular and sensitive) that the battery one has.(See my raving review in the battery operated HUM)My only negative is that you can only sync one brush to the phone app. In order to swap between the two, you’ll need to set up a whole new profile and have the app forget the other brush before you can use it.Bought for our 9 year old as her first “big kid” toothbrush. Before this, she has just had the electric ones from the store for kids that take a little AA battery. Love the charger, and love that the heads match the toothbrush and charger, she got purple and it looks super cuteA lot less expensive than most other electrics. It takes some getting used to because it's so light, but, eventually, you'll realize it's easier to use. Battery life could be better, especially if more than one person is using the handle, but the pricing is good enough to buy a second handle (which is what we did). That didn't completely solve the problem, but it made the problem much less of a nuisance. The travel case is nice, but the charger has to be carried separately, and you absolutely have to travel with the charger (unless you're only going to be gone a few days and you charge the handle right before you leave).The software is a little clunky, but it does what it's supposed to do. I'd especially appreciate better viewing options when you go to check how well you brushed, but having a computerized toothbrush is very cool, and I'm willing to bet that the software (and the hardware) will get better over time. Give it a try.This is the third electric toothbrush I have purchased through Amazon and while more expensive than the other two, it has not broken down. The brush took a bit to get used to as it is different than the others, but it is small enough to get into those side areas that are harder to reach with a larger brush. The charging system works well and the brush is easy to use. I like the color and design. It is convenient that it has a brush reordering system and the app that it uses is fun and can encourage you to clean your teeth.Three settings and a case for traveling. Love the color and appreciate the app where you can see where you brush well and where you miss. Several settings for ‘brushing intensity’ which I also like. Brush heads aren’t too expensive for replacement. Recommend!For brushing your teeth, the hum is great. It has a nice high power vibration that feels like you’re really getting work done. The heads seems to wear out pretty quick though and the replacements are a little pricier than I expected. I tend to switch them out once a month.Also the travel case is pretty basic. It’s a plastic mold and the brush and the head don’t fit in it very intuitively. You’re better off finding a better case of you plan on taking this on the road a lot.Siempre he tenido cepillos de dientes eléctricos, de varias marcas y precios, este es el mejor que he tenido. Tiene 3 intensidades (la 3era intensidad me pareció mucho, pero quizá alguien busque esto en un cepillo) el app esta increíble y es muy util. Te da puntos cada vez que te cepillas que puedes cambiar por repuestos. Hasta ahora es mi cepillo favorito.