This one was purchased as a gift, but I own one myself and the sound quality it brilliant for such a little speaker! The driver panel would have to be modified (I didnt). So far so good and works great. Man kann eben nicht sonst was erwarten & solange der Klang was hermacht oder die Kopfhörer nicht nach gerade einmal 6monaten schon auseinanderbrechen ist es durchaus was, womit man gut leben kann ;) So I was less inclined to be lazy about it. There are a few problems with programming it. It all worked out. So anyway, this thing fully sucks. I have very narrow feet and although they are slightly gappy, my feet dont slip around. Of course I take care of them.