I have no experience with the CZ, but I LOVE my 239! I bought it for the concealability factor, but I rarely shoot my other 9 (Beretta) anymore - the SIG is just too accurate, has an excellent trigger, and is too fun to shoot. This is the gun that I hate to put down. It's also extremely easy to conceal, and quite comfortable to carry. IMO, you can't go wrong with the SIG!