Just bought MK III Android media stick computer (with wireless magic remote controller). And I have admit that it is rather marvellous device. Definely worthwhile to get such device. However if getting one needs to be sure to get one with Android 4.1 at minimum (version 4.1 works definitely better than older versions).
However I am not so satisfied with magic remote, since keyboard on it works unrobustly. Meaning that it does not always register keypresses.
Since key input ain’t primary thing with mediacenter, issue is not too bad.
More specificly model what I got is:
MK802 III Android 4.1 DUAL CORE Rikomagic MINI PC 8GB Memory
Air Fly Mouse RC11
Total price for such device via ebay is around 70€ (with postages included). And delivery time from Hong Kong is around 3 weeks (based on my experience).