The Sonicare Diamond Clean is a great device. There is in my opinion nothing better for dental care. But you can buy like this offer a single handpiece, then considered a "spare part" and that means that you can not register the device with Philips and therefore can not take the warranty extension to 3 years to complete. If that matter is who can here but zugreifen.Wer emphasis on the extended warranty without hesitation, have to buy and live with the higher price (and the superfluous accessories) one of the boxes, including various accessories. A very annoying strategy of Philips. The lifetime of the batteries in these devices is 2-3 years, and if it is then again so far, you have all the accessories clutter again mitkaufen to get the extended warranty.