Saw it; loved it.
We prepped for this one, watched the OT again, then Phantom Menace, Attack of the Clones, and the Clone Wars cartoon. So the whole series was fresh in our minds.
Revenge of the Sith was the movie I *wanted* to see back when the prequels were announced. I think this is my second/third favorite in the series. I am of the few that really loved ROTJ mostly because of the Jabba rescue scenes (bikini...) and the showdown at the end, and Luke redeeming the Chosen One, Anakin. I used to put Empire right behind it.
I think Sith is going to be my second favorite after another viewing (if it even takes that). It ties everything together and puts the entire series in a new light. ROTJ was always kind of odd in that I was supposed to be happy that this bad mother...shut yo mouth...Darth Vader got to go to the light. I never felt the emotional connection to that other than through Luke. After this movie, the events in ROTJ are painted in such a different light, and I thought it was a nice tie to have Padme talk about "there's still good in him, I know it" as she dies...with a little baby Luke right beside her. Luke then carries that theme into his final battle against his father, who finally returns to the light. I care a whole lot more *now* that Anakin redeemed himself than I did then. Before it was more "yay Luke, ya saved yer dad." Now it is the redemption of a tragic character who lost his way because of his past and his depth of emotion that he felt for those he loved (mom, Padme).
This movie gave me more appreciation for Attack of the Clones as well, especially the killing of the Tuscan's in revenge for his mother as it set up his unrelenting quest to save Padme in Sith. As he said when he buried his mother "I failed you. I will not fail again." Tragic story, and this movie really tied everything together.
I watched Phantom Menace in the theatre, and was so disappointed that I didn't watch Clones until about 4 months after the DVD came out before I ended my boycott.
Sith was a great moviegoing experience...and the Obi/Anakin moment as Anakin lay legless and beaten was spectacular.