In my handpiece seat of the brush was rotated slightly, after a brief consultation with the service of Curaden (Germany) was impeccably resupplied me immediately a new handpiece. Great service! The two-year warranty period moves, as far as I am correctly informed, in the field of competition such as Philips or Panasonic.
The use while brushing is initially quite be described as getting used to. But the thorough cleaning effect is noticeable after the first cleaning process. Stains from coffee, tea or smoking are noticeably better than removed with rotating brushes.
Significant further experience I will possibly late filing here.