When you go to see this movie be sure to get the big bag of popcorn. That usually gets you a free refill. This is a 1 and 1/2 bag of popcorn movie.
Pacific Rim is very, very good — a modern update on the Godzilla theme but with an Independence Day plot.
It is worth seeing probably two or three times.
Some folks may want to compare Pacific Rim with the Transformers movies. There are indeed some similarities but I know plenty of folks that dislike Transformers and really, really like this movie. I like them both but believe that with time that Pacific Rim will become a classic.