I don't always get the idea of never using the issued mags.
People have posted that Colt mags are junk. I dunno; they always work fine in a variety of 1911s I've owned or do own.
People have posted that Remington mags are junk. Ditto, I don't know about that.
I do have some Wilson and McCormick and they seem to do exactly as well as the manufacturers' product. Maybe only truth will tell if you shoot 50,000 rounds a year through a 1911. Or maybe I'm just lucky with mags, of nearly any brand.