Very nice. :) It's simple and i like it that way.
Arrived super quick, i was chocked.
The sound volume could be i little stronger though, but it's ok.
Note that the manuel of instructions is in japanes, but you can probably find a version in your language online (as i did), or at least, in english, wich is easy to find online.
It is really fun to play, has a good little library of sounds, only con I would say is no 1/4 jack input. Can be plug with a 1/4 to 1/8 adapter. I would buy a 90 degree adapter though.