Just got my J-Bass in, and wow am I surprised. Finish is pretty much Fender quality, neck is comfortable and great (although could use a little wet sanding), tuners seem to hold pretty well, and the pickups...they get a decent sound, but are pretty noisy. Of course, I've only plugged it DI into my DMP3 using the "Direct Box Deep" setting on Garageband, but I'm more than happy with this thing.
Honestly, the only bad thing I have to say about it is the jack was loose out of the box, but hey, that's not even a complaint. Hell, it only needed extremely minor intonation adjustment that the average person probably wouldn't have even noticed.
Shame I got such a perfect one when I'm tearing it apart and replacing everything anyway.