A good belt/holster is the key to carrying a 1911 I think.
It is, and its true for anything really.
I carried either a Colt GM, or a Combat Commander, with a double reload, IWB daily for over 25 years. Mostly it was a Commander, as I prefer them, but the GM carries just the same. With a good belt and holster, you dont know the gun is even there.
The 1911's arent any easier or harder to carry than anything else. Once I stopped carrying a 1911, I carried a number of SIG's (P220, P226, P229), and Glock 17's, all with the same ease. All are very similar in size, and all conceal easily.
The only real problem I had with my Colts, was rust. Carrying IWB, working outdoors in all weather, sweating like a pig, and constantly wet leather holsters, are not a good environment for most guns/finishes. Hard chrome and kydex solved most of that problem.
I preferred Blade Tech IWB holsters the most, with Milt Sparks VMII's a distant second. I still have the first BT holster I bought, and even after 10+ years of daily use before retirement, its a serviceable today, as it was the day I bought it.
This is it here, belt is a 1.75", "5 stitch" Wilderness Instructors Belt....