The pinched dropout thing actually goes back to the dawn of time and it works, but it's sure ugly. I've heard complaints about the cheap deraillers being hard to adjust and not staying adjusted. I've had problems with dropouts being missaligned from the factory so you have to take a grinder to it to get the wheel in straight. The bearings are low tolerance, not really round or smooth. The races are stamped instead of machined. And the little seatposts won't hold my 225lb mass without bending.
I've got nothing against them personally but since you asked...Really the only two things that count on a bike are whether it's the right size for you and whether you like the color.