The device works without difficulty and has a great value for money. In terms of design, however, there are pros and cons: Positives are the small dimensions and the small weight, which recommends the device for mobile use. In addition, the rather non-slip plastic coating is well done. Negative for owners of large smartphones like Nokia Lumia 920/925 is the fact that the phone up, down and survives on one side over the small charging pad, so that you always can suspect that it is positioned properly. There is no leading edge, centering aid, etc. Furthermore, in this connection disturbs the close to the pad mounted on the current lead ferrite core irgenwie always abuts on the phone. For mobile use, the device is ok but while I would recommend for the desktop rather the DT-910 from Nokia.