I had a good long look at one of the SIG 1911's last week, and I didn't hate it.
However, I thought they took some unnecessary liberties with the 1911 form. The grip safety has an odd shape that doesn't work any better, so it is just a cosmetic change. The slide has a different shape that at first was off-putting to me, but I got used to it. This shape doesn't affect functionality, so once again; cosmetic. I really, REALLY didn't like the lock on the slide, at least Springfield put theirs in a location that doesn't futz with the steel. The hammer looks like a skeletonized hammer, but it was filled, a choice that makes little sense to me, again probably cosmetic. I'm also not a big fan of external extractors, but if they work for you, WTH. I'm also curious if SIG parts are compatible with other 1911's.
At the price it is a very crowded market with some truly great guns as competition. I'm not sure that a few purely cosmetic changes (some questionable IMO) separates the Johnny-come-lately SIG from the competition at all.
Is it a "real" 1911? If you aren't a collector, I'm not sure why it matters.