The biggest point of criticism is that the mobile phone has truly lie exactly within the markings so that it can be loaded without any problems. Is it only slightly offset, the charging process is interrupted. In the worst case, the mobile phone is eg. Not charged in the morning or at night you will be woken by the recurring vibration because the Invite activity constantly on and ausspringt.
In addition, applies to the 901, as well as for the 900 and 910, that the power supply is too clunky.