I have a 455 American, "plastic stock" that I bought as a donor to put a Lilja 17 Mach II barrel on. It shoots great, go figure with a Lilja on it. I did replace the trigger spring as I like lighter trigger pulls but have not as yet installed the trigger bushing. I am going to play with it a bit first.
I also have a 457 American in 22 LR which is a fantastic shooter. I was going to swap in the Lilja to this gun but it shoots so well I decided to keep it as is. I did replace the trigger spring on this gun also.
I have a 1710 DK L Annie and a Cooper Jackson Squirrel rifle also and the CZ's will stay pretty close to, or shoot with both of them depending on ammo and operator. CZ makes an excellent rifle.
One may want to do some trigger work on the CZ's if you like lighter trigger pull weight like I do but all in all they are good guns.
JMHO