He's given it a very good review, but let us not forget that the Times also gave Phantom Menace a good review. (Then again, that review seemed almost resigned to the fact that it didn't matter what the reviewer said, as no one was going to pay attention to any reviews considering it was the first new Star Wars movie in about twenty years.)
A few choice quotes from the review:
Would my grown-up longing for a return to the wide-eyed enthusiasm of my own moviegoing boyhood - and my undiminished hunger for entertainment with sweep and power as well as noise and dazzle - be satisfied by "Revenge of the Sith"?
The answer is yeth.
This is by far the best film in the more recent trilogy, and also the best of the four episodes Mr. Lucas has directed. That's right (and my inner 11-year-old shudders as I type this): it's better than "Star Wars."...
"Revenge of the Sith" is about how a republic dismantles its own democratic principles, about how politics becomes militarized, about how a Manichaean ideology undermines the rational exercise of power. Mr. Lucas is clearly jabbing his light saber in the direction of some real-world political leaders. At one point, Darth Vader, already deep in the thrall of the dark side and echoing the words of George W. Bush, hisses at Obi-Wan, "If you're not with me, you're my enemy." Obi-Wan's response is likely to surface as a bumper sticker during the next election campaign: "Only a Sith thinks in absolutes."