I've recently come in to a CZ SP 01 and it's a fantastic gun.
I have always been a fan of the 1911 as a "bottom feeder" but these nice steel guns with their different geometry are a real joy and they're accurate.
My problem is the magazine(s). I have 4 different factory magazines, two are 10 rounder that came with the gun and they work fine. The other two are CZ brand that I purchased and they don't feed reliably.
I can load them up to about 6 rounds (they hold 18) and all is well but as soon as I load in another round I can hear a "something is loose" type rattle and the ammo now will not hold tension and when loaded and firing the rounds just jam into the bottom of the feed ramp. Once you get back down to the 6 or 5 round mark all is well.
In my research I've come across Ben Stoger Custom Shop and they provide replacement springs and followers that are supposed to alleviate this problem.
I'm throwing this out there in hope someone with similar experience has some input.
I've ordered a Mac-Gar magazine to try and I can attempt to contact CZ after the holidays to see if they will offer a satisfaction warranty or something.