Like most sci-fi/adventure flicks, just don't take it so seriously and just go to enjoy the special effects and action and you should have a good time with Tron. I thought it was well done.
My wife an I LOVED the first Iron Man, but were both disappointed in this one. We couldn't believe how badly the movie dragged for the first hour and a half, and then it finally go going in the last 30 minutes with action and effects similar to the entire first Iron Man. I hate to say this, but I'd pass on seeing Iron Man II.