I'm of two minds on this. I certainly believe that part of the fun of Star Wars is that its universe extends beyond the boundaries of the movie screen. However, I admit I'm a little resentful that the movie is being judged not on its own merits as a movie but according to how well or how poorly it corresponds to events in the novel. I agree with Loremaster that you shouldn't have to read the novel in order to make sense of the movie. Of course, whereas I see treasure in Episode III, LM sees trash.

Some first impressions:
- Episode III is definitely more emotionally engaging than I & II. The scenes between Padme and Anakin were more expressive than before, and I actually found myself gripped by Anakin's descent to the dark side. I think Haydensen finally comes into his own and does a credible job of portraying a Jedi spiralling out of control and turning into something frightening.
- I love the rich dark cinematography. It gives the film a beautifully brooding feel. I think Revenge of the Sith and Empire Strikes Back are the two most gorgeous-looking SW films.
- The collapse of the Obi-Wan/Anakin partnership was a heartbreaking thing, amid all the other tragic happenings. What a great fighting team they had become--as seen in their battle against General Grievous. Between them, Anakin and Obi-Wan would have been an almost unstoppable duo, especially since the Force was so strong with them. It makes Obi-Wan's feeling that he failed Anakin that much more moving. What wasted potential...
- The slaughter of the Jedi knights was well-conveyed, as others have said. It's chilling how the Clone warriors of the Republic suddenly turn into cold-blooded murderers via a simple command, almost like flicking a switch. "Hey, we were just following orders. Sieg Heil!"
- The Padme/Anakin/Obi-Wan confrontation on the molten planet was for me one of the most powerful scenes in all the SW movies. I felt sympathy for all three of them. I could just sense the emotional/spiritual abyss opening up around them. There might as well have been a sign stuck somewhere among the lava pits: Abandon Hope All Ye Who Enter.
- I agree with DR that after seeing all the amazing lightsabre fights in the prequels, the ones in the original trilogy seem underwhelming, but they are no less significant. Besides, witnessing Obi-Wan as a potent Jedi defeating Anakin in Ep. III only deepens the weird poignancy of seeing him in Episode IV as "old Ben" clashing once more with Vader.
- The visual juxtaposition between Padme on her operating table and Anakin on his was well done. She dies but gives life and light to the world in the "new hope" of her babies. He lives but brings death and darkness to the world in the form of Vader.
- I got a kick out of the scenes inside the Rebel blockade runner. As soon as I saw the familiar white walled corridors, I couldn't help but smile. It nicely readies the viewer for the beginning of Episode IV. Same thing with the proto-Star Destroyers: their progressively larger sizes sets the stage for the familiar, stupendous opening shot of A New Hope featuring a true Star Destroyer soaring overhead. I really enjoyed these clever little visual cues from Lucas. The final shot on Tatooine put me firmly into Star Wars geek mode, heh. Out of death and despair a new hope emerges...
I side with Darth Revan. Revenge of the Sith rules!

After the movie, I went home and immediately watched Episode IV. Knowing what transpired in Episode III definitely colored my response to A New Hope. Very interesting.

My attitude is that there is so much good stuff in Episode III that I'm focusing on that and not on the bad, which amounts to relatively minor things in my view. I'll let the naysayers talk about the flaws. No, really, I encourage more negative views to come forth: "Yes...I sense anger...let your hate flow through you!" (in my best Emperor voice)
Actually, the human body turns out to be more resilient than you might have thought. In Jeanne Cavelos's book, The Science of Star Wars (all SW fans should check it out, heh), she goes into detail (yeah, it's gruesome) about what would happen if you were to fall into lava. Well, you wouldn't necessarily be a goner. If you got out quickly enough, you would survive (and in the movie, Anakin doesn't even actually come into contact with the lava, though he does lay on the hot slope above it for a while...which is, er, not good). Cavelos mentions a case of two geologists who fell into lava at the Hawaii Volcano Observatory. The lava wasn't very deep, and they managed to get out quickly. After hospitalization for their burns, they both recovered without serious permanent injury.Fist and Faith wrote:Ainulindale wrote:
-Anakins defeat by Obi (legs buring) was done much better than I thougth it was going to look like. I do have one question....wouldn't the proximity of the heat be somewhat unbearable, at least making one sweat more profusely, or is it so hot, does it evaporate instanttly:)?
I'm willing to assume the Jedi have some abilities like the Bene Gesserit, so they can probably adjust their metabolism. Or maybe just use the Force to keep the heat away? Heck, Anakin should have burned to death rather quickly, and I don't see what could have kept him alive other than his use of the Force.