A poster in another post (I didn't want to hijack the other thread) mentioned that no one ever offers opinions on the 1911s by SIG. I find that curious also. Given how many 1911 fans / gurus we have on board, you'd think at least a few of you have handled a few and have an opinion one way or the other.
My default opinion, without ever having handled OR shot a SIG 1911, is that based on SIG's reputation, and my own experience with other SIGs, it would have to be of moderate to good quality (if not excellent). But again, I wouldn't know.