I'll vouch for the build quality on the Sterling SUB line. I just sat down yesterday for an hour and played the Stingray and Sterling variants at Guitar Center through a Markbass 1x12 combo. Compared to a lot of the imports that used to be prevalent (Jay Turser, OLP, JB Player) they're definitely a step up. The finish is really basic, but they took the time to address the sharp fret ends that many of the other companies have ignored in the past. I liked the Sterling copy better, but only for the fact that it has a slimmer neck. Electronically, it's a little harder to find the sweet spot in the eq. With the lows boosted, the E string was really boomy compared to the others - volume wise, it was like the E was at 10 and the other strings were at about a 5 or 6. That said, there is definitely a sweet spot there, and when you find it, it makes those basses a great bargain. That's my take on the subject.