The price is really good. The installation under Windows was also no problem. Only the Mac I had almost desperate. At all USB ports, the device was not recognized. With the MIDI audio tool it could not be found. Only after frequent plugging and unplugging it appeared there and under GarageBand work right away.
Points deduction is available for the instruction that is about. It is a copy of a copy copied the format and according to DIN A8 'good' readable.
For a start the product is recommending all times and OK.