I greatly prefer CZs and am far more accurate with them. I've also never had any failures with my CZs, but I've personally had Glocks malfunction on me, as have my wife and some friends of ours. I know that they're generally reliable, but I just don't do well with them.
The only Glocks I would ever buy would be 10 mm (20 or 29) b/c of size & caliber combo. I can't think of another 10 mm 15+1 polymer in that kind of package. The Glock 20 fully loaded is a lot of firepower in one package. In any other caliber and/or size, there are multiple other guns I would prefer before a Glock. I hate the ergonomics of Glocks b/c of their grip angles. The sights are nice, though.
I've shot a fair number of Glocks, but I just cannot warm up to them despite my best efforts. I WANT to love them b/c they have so many size and caliber offerings that have interchangeable magazines between sizes, etc. But they're just not for me. If CZ made a 10 mm 75 variant, I'd buy it in a heart beat.
That said, my neighbor was a hard core Glock guy who was planning on buying a Glock 19. Then he fired my CZ 75, and he's a believer. He now wants a CZ. He also loves my RAMI. So I've seen converts from Glock to CZ, but not vice versa.