I own several 1911 frame handguns, while all of them are in the 10mm caliber, as opposed to the .45acp, the only down sides I've found to them is that they are not the most concealed carry friendly when matched against some of the newer designs in the market...
1)Heavier, and unless modified,
2) the butt can tend to hang up on loose clothing,
3) as well as 'printing' when under a light weight shirt..
4)Most are designed to be carried 'locked & cocked' and require a conscious action to release the safety...
Otherwise I have no problems with the design or reliability...
Before I start a war, let me say that
I've tried some very well made, and expensive, holsters and belts over the years,
I have yet to try one of the 'bobbed' grips,
my personal body design requires me to wear a handgun a little farther to the back than most people, and
having been a certified firearms instructor, I've witnessed numerous trained personnel engage non-stressful targets and forget to release the safety during a mild qualification...as the stress factor is increased...