Just as fun and exciting as Episode IV which it references more than a few times. Though I really loved seeing old friends (especially Han Solo and Chewbacca - and even Admiral Ackbar and others!) the new characters are so likeable and interesting. I hope they explore their backstories in future films - and bring 'em on!
Right, I'm going back in the holidays to see it in 3D with imhilien. :-D
Also posted on Dreamwidth, with comments.