friend had an xsautocrap turbo that blew oil seals right away, so he sent it off to get rebuilt with garrett internals, or whatever...
Also, his xsturdblower manifold cracked not once, not twice, but 3 times... (his downpipe also cracked once)..
I will give the xs the benefit of the doubt, in that he wasn't running any braces (mani / turbo / dp had none to offer anyways).. and he / they also failed to install a flex-pipe in line with the exhaust.
also, about the wastegate...
I would have no worries running any wastegate, being that most tune programs (crome, uber, that-other-fancy-crap...) offer a boost limiter, much like your existing rev-limitier, in where you set a max boost point (i.e 10lbs) and car cannot boost over that point.
Ive hit my boost limiter a few times, for stupid things ive done... none of which involved a faulty wg. I would NOT put my faith in ANY wastegate regardless of the manufacturer.