If this is the gun I think it is, made by a Yugoslavian firm (as opposed to the Czechoslovakian CZ firm), the gun is NOT an improved copy of the SIG 226.
The CZ-99s I've seen reviewed and tested are, in fact, based on the CZ-75 design. And while the CZ-75 is a very good gun, the CZ-99 is by no means as good as the SIG 226.
Buy a used SIG 226, or get a new or used CZ-75); you'll end up with a better gun, made of better stuff, which will be more reliable and probably more accurate, too.
Chromed, by the way, looks good, but its not a practical finish if you ever plan to carry a concealed weapon. (It is durable...)