The stability (I just use the base with the four supplied Aufklebefüßchen) is neat with my Lumia 1020. I can operate docked without any problems, without any wobbles noticeably or even a hint slips away. For larger devices (phablets, tablets) but it could be a bit unstable because of the small width. But this is supplied to a anklebbare underground extra leaf here that fixes the whole station and makes rotate simultaneously.
The USB plug fits perfectly into my Lumia 1020, saying he glides with just the Richigen ease into the socket. It is positive that the plug in two orientations (thin or thick broadside broadside front) can be used, because, unfortunately, the manufacturers are not quite sure which way round now is right around.
A small minus is that the cable is out with less than a meter short. So if his PC - like me - has under the table and the station it needs an extension, or a HUB within reach.
Conclusion: A very versatile and high-quality looking docking station that keeps everything it promises here. Unrestricted buy recommendation.