I think it's great for pinball, and I plan on going back this year. There are some rare games, and the people are pretty friendly. The huge number of video games also is pretty neat as you can play them a bit for kicks between checking out pinball machines.
One word of warning, however. There's no other show that I've ever been to that attracts as many unwashed people as CAX. Be prepared to be elbow to elbow with stinky dudes far too often.