My dentist recommended a Sonicare years ago because I tend to press too hard with a normal toothbrush, which has eroded my gums above my top premolars. It does ok, but I don't feel like it gets the grinding surfaces of my molars as clean as a manual brush. I end up going three cycles, at least, before I feel like everything's clean. No way will I be paying $300 for an intelligent vibrator. I'd really like to find a true rotary.