I bought this due to the low price point. I use it for fooling around and nothing more and it does that wonderfully. The interface is pretty straight forward for basic use. Click to start recording, click again to go into overdubs, click again to stop. Double click to undo.
It holds hours of samples inside of 99 save banks. After a while you end up with a large library of your own chops to jam with.
It has independent volume for input and sample playback as well as a primitive drum machine that tries to match your tempo. I don't use the drum parts because they sound like lo-bit trash (which is odd since the machine is a sampler and has huge memory - why you no put decent drums?).
I can't fault the sound quality. No issues with playback and pass through.
All in all this is a fun tool for laying down a pattern and working on your leads without a huge cost.
This review was for the v1. There is a v2 out now, but I'm not aware of the improvements.