This battery operated toothbrush emits a soft humming sound and the motion it produces didn't bother my sensitive teeth. I found it to be a relaxing toothbrush and find myself brushing my teeth longer than usual.
As an avid coffee drinker and the stained teeth it sometimes leaves behind I found this toothbrush actually removes stains. I swear my teeth are actually whiter after just a few weeks of using this toothbrush. Another plus due to its vibrating motion is that it keeps me from scrubbing my teeth or gums too hard.
The tongue and cheek scraper on the back side of the toothbrush is awesome too. It's basically an all in one tool for oral hygiene.
They come in a variety of colors and the bristles come in hard, medium or soft so there is definitely one to fit your needs. The average price is around $6.00 which is comparable to other spin brushes I have seen.
It is my understanding that your toothbrush should be replaced every 3 months as the bristles do where down. So, if you are in need of a great toothbrush, give this one a try!