If I get another 1911 I think it will be the new "Nightmare" model; maybe even in 357 SIG when it is released.
The only word I've ever gotten about SIG 1911's having problem was a batch with thumb safties that tended to fall off. That was two guys about a year and a half ago; not read or been told of it happing before or since.
Fit and finish seem great, trigger is good, night sights are good
IMO Sig 1911 are good to go.