I have a Sig Nightmare 5". I haven't had it long. Probably has maybe 400 rounds total through it so far. I ran about 150 through it today. So far it has been 100% for me on three different outings.
I have seen nothing so far to make me believe that Sig's 1911s are not at least as good or better than others in the same price range.
I will probably buy another...I have my eyes on the Scorpion.