I use an Oral B model its about a year or so old. Cleans pretty good and replace heads every 2 weeks, I am kind of strange that way. Model I picked up had two units which worked pretty good I keep one at home, and keep one in the car for use at work or when I am away from home. I just have to keep remembering to charge the one I keep in the car every few weeks so it doesn't die on me.