I'll just add my voice to the chorus. This is a great movie. It is far better than any of the previous Star Wars movies, including the three that I though were good :

Star Wars - Episode IV: A New Hope (1977)
Star Wars - Episode V: The Empire Strikes Back (1980)
Star Wars - Episode II: Attack of the Clones (2002)

When George Lucus stayed away from hokey humor and cute little teddy bears (Ewoks), the movies were much better. And you can't get much better than this last one. It's grand opera.

I had a sense of a history, both cinematic and personal, being completed when this movie ended. Has it really been 28 years? I was a bit surprised at my emotion, and at the fact that I was so proud of Lucas for giving us such a fine ending to the saga. Revenge of the Sith is his best work since THX 1138, which I first saw at a drive-in movie theater, long ago in a galaxy far far away.