I own one. I prefer the Raspberry Pi.

- Running Android seems .. useless without a touch device. Tried it, was basically useless for me.

- Running various Linux distributions was not nice either:

* (Fixable) The community projects feel a lot less polished than anything the Pi has

* (Unfixable) The HDMI port sucks. On all TVs I connected it to I have under-/overscan issues. There are no boot options similar to the Pi that allow me to fix that. The IRC channel suggested to 'Fix the TV'...

Looks nice, cheap, interesting specs, but collects dust over here.