I own and carry a 3" Kimber Ultra... and I will say that, if you are a Glock guy, and you have reliability concerns about a 1911 to begin with... you may never get over those.
I had several 1911s before slowly coming over to the Glock side. I still carry my Ultra, and although I'm not a huge fan of Kimber, mine has run about 800 rounds without a single issue. I absolutely love the profile and ease of carry in the platform. Where else will you conceal 8 rounds of .45acp within 26 ounces, thinner and with a nice SAO trigger?!
If I remember correctly, Kimber recommends replacement of the captured recoil assemble every 1800 rounds. By nature, a 1911 is going to require a little more attention to issues of reliability than, say, a glock. There's no reason that one can't run perfectly reliably, but there is simply less room for error. Literally.