I'm a big fan of the Micro Springfield, but that's because of how I have to carry it. My boss has told me I will be fired if I carry at work, so it is imperitive that I not be spotted. Due to this, I use a Smart Carry holster. They claim the SC can handle larger guns, but I don't see how. The Micro is as large and heavy as I think I could get away with in this rig.
The Micro fits my carry requirements and mine is very reliable. It took a bit of trian and error to get it reliable, but it now works great. For range use, I practice with standard ball ammo or even light target loads. For defensive use though, I have to use 165 grain Federals. Every 230 and 185 load I tried would jam at least once per 25 shots. It was usually a premature lock open with one round still in the magazine. It doesn't do this with the 165 Federals and I've put over 100 rounds of this through it.
When I'm not working, I carry a Champion or a full size 1911 in a high end holster with a heavy belt. When working, I carry what I can and that is the Micro.