I ran the magazine gamut myself for many years, never came across any that were terrible, other than some very old USGI mags. I suspect they only needed new springs.
Others have had followers replaced, feed lips tweaked and polished.
All that said. I just recently bought 10 Wilson ETM's. With shipping the cost was more than many new pistols on the market today.
I obviously found them to be the best I've ever tried. They all fit and function perfectly and no issues with any load I've run through them.
Every other 1911 magazine I own got Wilson springs and followers. I don't expect any problems with any of them in the future.
JMHO, for what its worth.
I guess I have a lifetime supply of good magazines for my 1911's. One is a recently aquired (Sept) Wilson XTAC in .45, the other is a mid 90's Kimber Custom Classic that has an unrealistic number of rounds fired without serious issue.
That old Kimber is currently at a respected 'smith getting rebuilt with Wilson bulletproof parts. Everything but the frame & slide are being fitted as we speak.
A nice shiny DLC refinish and new grips and it'll be ready for the next 30 years.
I guess I probably should've just tossed it in the recycling bin, the internet has been telling me for years that a Kimber will shoot itself apart in a short time.
The Wilson is more accurate, by about an inch. The Kimber cost me $543.00 OTD. The Wilson was considerbly more, by a lot. But hey! I got an extra inch.