Rotadent is the best electric toothbrush. Using it is like the hygienist or assistant polishing your teeth. Rotadent has a lifetime warranty and the company stands by their product. All of my patients that have had any issues with the toothbrush have received replacements without any hassle. This toothbrush may not be for everyone as you have to look in the mirror and brush one tooth at a time. It is also so light, that you can not feel it on your teeth unless you are looking or really talented. It shuts off if you put too much pressure on your gums or teeth. Rotadent does not seem to cause toothbrush abrasion like some of the other models.