I use the keyboard for several weeks now. The quality is not objectionable. Who, like me, for a keyboard with low lift searches (like a notebook keyboard), which is well served with this model. Important to me was that the keyboard still has a standard layout, so no big familiarization is necessary - also this point they met almost perfectly. Only with the Alt Gr key, I sometimes have to struggle a bit, have a feeling she sits slightly to the right and the function keys do not have distances (corresponding to the usual 4-grouping). The keyboard is fairly quiet, who value on a keyboard should absolutely whisper quiet but perhaps other models compare. I myself have made no further comparisons this, but would imagine that there are some quieter keyboards. The multimedia keys are ahead, are with the surface of the keyboard but at a height. Inadvertent Press can not happen this way. For occasional adjustments to the volume / mute and between tracks, etc. super convenient. Music junkies that the keys are often need in my opinion with ordinary multimedia keys better served at the top of the keyboard (I had at my old keyboard). The additional USB port is useful to for example a notebook mouse with a short cable. To a USB flash drive once briefly to connect the output is somewhat impractical backwards. A real stroke would here certainly more useful than the "built-in USB extension cable".
Conclusion: The keyboard is good for those looking for a standard layout keyboard with "notebook Key" and good workmanship for a reasonable price. It serves its purpose well, but also in all areas of slight shortcomings. Good ideas, but not entirely thought through. Therefore, only 4 out of 5 stars.