Don't have a 455, but I have a 452 scout and a 527 in 22Hornet. The "good" is they are great rifles. There is no "bad or ugly" about anything CZ makes.
I had a 452 and I liked everything about the rifle EXCEPT their stupid backward safety! Why would a company call a rifle an American then put a safety on it that is completely backward from every other American rifle! The only reason I sold it was because of the safety.
I bought the rifle and got a smokin deal on it with a Burris Fullfield II 3x9x40. Only got 1 mag with it so now I need a source for reasonably priced magazines. I about fell out when I looked online.