You can emu pretty much anything at full speed with that (provided that you've got the MHz and RAM too)... except next-gen systems. The only exception to this is one GC emulator and Bust-A-Move 3000.
It is, but it is proven to be one of the best as well. This software by them is brand new might I add. I remember using Copernic a few years back, but for some reason I got tired of it and never touched it again. But yes, it does it's job very well.