Episode III was very good. Everyone should go see it. My Jedi mind tricks worked on the stormtrooper taking tickets; he didn't even notice that I gave him two tickets for different theatres.
The lightsaber battles were fun, and General Grievous was quite entertaining. Yoda, just like in the previous two movies, stole the show whenever he was on. A couple of the arenas where the lightsaber duels took place were pretty ridiculous and contrived, and the romance scenes are just as bad as you remember them from Episode II, but overall, it was very worthwhile... even though I was soaked through the entire movie from when it was pouring outside while we were waiting in line.
I have mixed feelings about the ending. I'm not going to talk about it because I don't want to spoil anything, but after you see it, think about Return of the King's ending. This is kind of like how I wished Return of the King would have ended... but yet, in this movie, it seemed... incorrect. Maybe because this movie is more like the Two Towers of the Star Wars series than the Return of the King.
My proudest moment of the night was when someone behind us commented during the opening ads that there was a dead pixel on the screen. Then, he and I (I don't even know who he was) whispered roughly in unison, "I see dead pixel."