Definatly worth seeing. Without giving away spoilers, and just commenting on things people already know.. Jar Jar is infrequent, and his final appearance is suiting - although unless you know Star Wars, you won't realise how well Lucas finally got rid of the annoying twerp..
The highlights are all in the last 30 minutes, really. Yoda rocks, totally. It ties the trilogy to the prequels very well.. the acting is suprisingly good, and everyone in the cinema burst out in simulatanious laughter whenever the annoying sickening romance scenes appeared.
Now I sleep ;)