That Cx4 chip thing was pretty neat, and this is a solid, solid Mega Man title. That said, I never found it half as much fun as the first and third Mega Man X games. I didn't care for about half of the robot bosses either: Crystal Snail, Overdrive Ostrich and Magna Centipede always struck me as lame.
this one was great also was the first capom game to use the new game chip i think it was called the x chip cant recall but it made some enemys have a 3d look to them (zeros theme was great !)
Pretty fun. It was really, hard, though. Gives a lot of troubles.
From what I could remember, this was a good game that was as good as the original.