I have used electric toothbrushes with batteries for at least 15 years. One is my favorite by far.Compared to the old Colgate electric toothbrushes with batteries, and the Hum with batteries, One is superior with its slender design and convenient holder. I love being able to recharge this toothbrush. As a result, the toothbrush is much lighter and less bulky because it doesn't need disposable batteries. The ability to recharge makes it a greener and cheaper option in the long run, and it's more convenient too.The head of the toothbrush is long and thin. I much prefer it the head of the Hum which is very small. The Philips One comes with a much more elegant and functional case compared to the Hum. For travel, it wraps up in the case like a wand.When I purchased the One, I did so because the heads for the Hum had skyrocketed in price. Then I saw the Philips One rechargeable, a feature I'd been longing for, and it was on sale to boot. I tried it out and I love it!One thing to note: the plug into the device is not compatible with any other charging cord I have. I wish there were a few universal designs, or even just one universal design, because it is a hassle to have so many cords for different devices, particularly when I travel.