The SIG GSRs had a lot of problems when they first came out, but SIG made a concerted effort to get them fixed, etc.
I bought mine used, but virtually unshot. (It was a very low serial number.) The guy who bought it was going to use it in competition, gave it to a gunsmith to do mods, and the gunsmith screwed around for about three months and did nothing. The original owner got a different gun and decided to sell the SIG GSR.
It has been flawless, and very, very well made. The only negative is that its too heavy for IDPA (at least in sanctioned matches.) I think I may have the accessory rail on mine machined off, one of these days, and that will probably remove enough weight to make it legal.
Very, very nice, crisp (custom quality) trigger at about 3 pounds. Absolutely perfect function. Good looks. What's not to like.
I paid $900 for mine, and they're now running about $1200, new, if you can get one. I'd put it right there with most of the Wilson Combat guns in terms of fit and finish and accuracy. (The Wilson guns are a little bit prettier, though.)
Two of my IDPA club buddies also have them, and think highly of theirs, as well. CDNN is selling the Novak mags that come with these guns four about $10. I paid $29 each, for several. (#$&@!!!)