I used a CZ75 9mm for a while in IDPA, but eventually switched back to my Glocks. The reason was that the CZ was so tight a gun that after about 250 rounds it would start jamming up due to powder residue and such. This wasn't a problem in matches (it arose during day-long shooting classes), but it made me nervous. I can't say this is true for all CZs, and otherwise it was a dynamite gun--my most accurate by far. Maybe I should have worked on it some, but mechanics isn't my forte.
Cheers,
AndyP