S'funny, darn near every one of the GMs I've owned over the last 30 years has worked fine with little/no work.Replacing bad mags has been the biggest problem. Nobody throws out a bad mag, they just resell it. Some needed tweaking for accuracy, but all were reliable except....
I owned a Colt Officer's Model, briefly. After some serious gunsmith bills w/o imporving relaibility, I decided I didn't need to own that one after all. 20-20 hindsight, once one gets down below Commander size, problems multiply.
Current pet will feed and chamber an empty, sized case.Colt made it in 1943, it has Brit proof marks, was rebuilt by Alton Dinan and used at Camp Perry by the previous owner. I got it from the estate.
T'were I in need of another GM, I believe I'd pick up a GI clunker and start replacing parts. The new stuff all seems to have QC glitches big time...