I bought a bunch of Chip McCormick mags for a couple of my 1911's several years ago. None have failed me to date. And they get used a lot. I guess I'm noty abusing them but they do get dropped in the dirt during quick reloads at the range and stuff.
Everyone has their fav flavor when it comes to things like that.
The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. Thomas Jefferson