I'd generally avoid most of the Chinese suspension components too. Years ago I tried my luck with some eBay adjustable arms with the steel pillow balls. When they turned up in the mail the welding was shocking, full of pin holes, and brocken mig wire in places. I couldnt believe it could have left the factory like that. The steel tube looked like it was a piece of rolled plate and varied in wall thickness along the seam from about 3mm to 1mm in places. There was no way it was going on my car - major death trap waiting to happen. Fitting a part like that would be a major step backwards.
I have also toyed with a chinese split dump pipe, again from fleabay, the photos of the internals in the ad looked ok, but in reality looking from the opposite end when I received it, they were poor. Similar to the Chinese GTR intake pipe thread that was posted here not long ago. The quality of the stainless steel used was also very bad. This part didnt make it on my car either.
Those are the only times I've tried China parts, they never made it on my car, and I won't be buying their stuff again.