I have to disagree strongly with watchamacallit when he or she says the Sonicare is no better than Oral B. Just after my last dental visit, my first, basic Sonicare arrived. I used it for the 6 months before my next visit, sat in the chair opened my mouth and said 'spot the difference!' My dentist was very, very impressed, she uses Sonicare and in fact recommended it to me. Oral B were quite good but the new design heads wear internally losing all the mechanical movement way before the brush head goes. The Phillips suffers no such problem. My teeth are now whiter and less sensitive than they ever were using Oral B.