I have one and though I've never thought of it as a bench-rest accuracy type of pistol, it shoots about minute of beer can. It shoots even the cheap ammo really well. They are supposed to be a "minor fitting required" item. I did not have to touch mine. I put it on a CZ-75 -- not the B model.
Another friend with a CZ-85 found his to work well also. Yet another friend with a CZ-75B found that my Kadet will not even fit on his 75B but the kit that belongs to the guy with the CZ-85 will. They are only a few serial numbers apart. We made no effort to determine why it didn't fit.
So, knowing what I know, would I buy another?
In a heartbeat. They are fun and they work better than ANY .22 conversion I've ever owned.
Brad