The cast firing pins can and will break, even if you don't dry fire the gun at all. Inspect the magazines, especially the floor plates. My example had the tendency to move under recoil until they slid off of their rails. Firing three shots and feeling the spring follower and 5 cartridges impact my shoe, for an interesting shooting experience. A little red loc-tite solved that problem. I've also seen CZ's offered with aftermarket magazines that are oversized, meaning you practically have to pry it out by the front tab.
I use a Hogue mini grip over the bakelites and the Makarov.com competition firing pin. It makes the trigger pull extremely light and short, but there is a side effect. It new firing pin disables the firing pin block! The decocker is now a second trigger 100% of the time (ask me how I know). Particularly bad since the decock position is full up past the safe position. Decocking a loaded single action pistol is foolish, and this isn't a carry piece so it isn't that big of a deal. If you choose to install the same pin, be sure to warn first time shooters to avoid a ND.
Shooting the CZ is highly entertaining. Though crippled a bit by shallow miniscule sights, it is accurate enough to put a serious hurt on a human target out to 100yds, aided by the flat trajectory of the 7.62x25 round. The muzzle signiture is dazzling and the report is quite sharp, drawing the attention of the fellow shooters who aren't being pelted by your high-speed empties. Mine puts spent brass into low orbit, landing about 30ft to the right of the shooter.
Plinking at a farm refuse pile, I noticed that Czech FMJ rounds penetrated both sides of heavy 1960's refrigerator, 9" diameter hardwood logs, the body and internals of a commercial/school drinking fountain, and a .25+" thick hardened steel combine blade. I certainly wouldn't want to try to take cover behind anything less than an auto engine block or a serious concrete wall.
All in all, they are "fun guns" to me and would recommend them to anyone.