You know what's really annoying? When you buy a new ~$1100 gun and right out of the box the mags don't want to work.
The DW Heritage shipped with two Checkmate mags. They are only so-so in the reliability department, with the biggest issue being the first round in the mag nosediving when trying to load the gun. They do seem to run better at the range as long as I only load 7 rounds, but I don't trust them and they've been relegated to range-only mags.
My Chip McCormick Power Mag Plus mags? Not a single problem. They've run flawlessly in the Heritage since day one without my having to download them.
I also bought one Les Baer mag. With the slide closed I can't even insert a loaded mag. It'll go 90% in and I'll encounter a ton of resistance. I'll be giving that one to Laura & Chris the next time I see them. Maybe it'll work in one of their 1911's.
I guess that's what you get when you buy a 1911, and why there are a million different manufacturers of 1911 mags.