I disagree with the review somone has left regarding this product. I have used a Sonicare toothbrush for a few years now, and as a result never need to see the hygienist at the denists. No scale build-up, thanks to Sonicare. I used a previous model, which used larger heads, and when that failed, purchased a new model. I find the slimmer handle of the head good to reach the 'difficult to reach' places, and they have continued to do as good a job as earlier models. I don't regret my purchase of a Sonicare, it has saved me a fortune in dentist bills!