After the 4th Sonicare in our family also, I allow myself a judgment that but like the other reviews: . After the article's been so many years in the market and so much is that Fa Philips should be able to resolve a few fundamental design flaw: After 1 1/2 to 2 years from loosening the pin, the plastic sleeve is rotten, the device is irreparably broken. Or if your battery is on; also the irreparable. The brushes have a justifiable nothing extremely high price. One feels this verschaukelt and cheated because you have no choice .. But: The cleaning effect is really great.