I thought it was the best of the prequel trilogy. Why? Because Anakin didn't just turn evil, he thought he was doing the right thing the whole time. He really thought the Jedi were threatening the democratic ideals of the Republic because he didn't realize how Palpatine was manipulating everything.
The whole time, he was an impetuous, influencable youth, and Palpatine took advantage of it.
Lots of nice tie-ins. For example, Jimmy Smit's ship was the Tantive IV, the first ship seen in the whole series (the one Leia was captured on). When he talks to 'Captain Antilles', I remembered that that was the name of the captain who Vader crushed the throat of in Episode IV when he lifted him off the ground in the beginning.
The method used to wipe out the jedi was a lot more realistic then Anakin going out and hunting them down one by one, and explained how it was they could be taken out so completely.
One thing missing that I was sorta hoping for was a scene to explain the 'Force/Mescalin' tree from Episode V (where Luke sees himself as Vader).
Alderaan looked like the planet Paramount. Seriously, the place they landed looked like it was surrounded by the Paramount corporate logo mountains.