It took me a long time to come around to buying one. I've since tried very hard to not like them, but keep coming back to them. They just work for me. I shoot them better than anything else I've tried. And I've tried the Smith M&P's. On paper they are a better gun, but not in my hands. And a M&P is only about $50 less, not $150 less.
A couple of months ago I did pick up one of the Sig M17's. Once again on paper I like it better, but time will tell. For now I still shoot my Glocks better. But I'm going to give the Sig an honest chance to win me over.