Overall, I'm loving this bass. Sounds almost like a small contrabass with less bass and more midrange honk. The rubber strings take a little getting used to, and I'm trying to get the hang of it at the moment.
PROS:
Fun, good instrument you can use to mimic the contrabass without the bulk. Well-made, fun, and plays great if not for the rubber feel of the strings - which really isn't anyone's fault. I think the strings are aquila thundergut, because I ordered thundergut along with the bass and they seem exactly the same.
CONS:
The piezo, like everyone else seems to mention, is problematic and needs to be taken care of. the D,A strings are very loud and even clips in my case. In comparison, G is soft and E is very soft.
Recording it with a mic (with noise reduction + eq) makes it sound very, very convincing. Recording with the piezos are a problem at the moment, but we'll see how the piezo fix holds up.
UPDATE: I sawed the saddle so each portion will accommodate 1 string each. It sounds great now, the volume between strings is very well-balanced and removed the clipping problem as well!