i research them for about a yr before i picked mine up...read old road and track mags and read alot more driver reviews,,theres alot about these cars that you'll either say "awesome!" or " f that!"....save up the money because most likely the cheaper u get the z for the more money your going to HAVE to put in it. i say 'have' because if u do get one you'll learn that every penny you have will go into making it better, quicker...and so on