Just saw it yesterday. I thought it looked and sounded great, but the story was a bit lacking. It would have been cool to have seen at least a little first person shots to give the audience the feel that we're inside the computer.
Also, as a User, I thought Sam would have had more unique abilities than he displayed.
I liked the idea of the ISOs but their story was snuffed out even before it began. It would have been more interesting to focus on them and why/how they came into being rather than focusing on Clu trying to break out into our world. That theme has been done too many times.
Loved the music by Daft Punk. I'm so going to have to find this soundtrack.
I give this movie a 3/5. It was good but certainly could have been awesome given a couple tweaks.