wow, coincidentally, I just bought it 2 nights ago...
Watched half of it, turned it off and went to bed. I watched the rest of it this morning. Script was lame. CGI for wookie planet looked very CGI-ish... Ditto for the flying birds (pterodactyl looking things) on the planet that Obiwan went to. Dialogue between Anakin and his wife was horrible.
It *did* do an excellent job, as far is showing how Anakin goes to the dark side... Otherwise, it sucked.
Anakin/Obiwan fight at the end was pretty good, as was Yoda's fight (his are always good). However, Obiwan's line "it's over, I've got the high ground" was too much of a clue of what was about to happen, and utter b.s. since having the high ground has never mattered before in all the other fight scenes with jedi, episodes 4-6, 1, and 2.
Nonetheless, it was the worst movie I've ever dropped $20 on, and I'm glad that I missed waiting in line and seeing it at midnight when it first opened (as I did for the others)