As usual, I direct you all to the Pajiba review of 300, which is spot on, but beware of minor spoilers (as in all reviews).

http://www.pajiba.com/300.htm

My metric in what i wrote back to tom in the Neal Stephenson thread dealt with it's faithfulness to the book, and it's power as an action film, but fundamentally, Daniel is correct in his assessment here.

My main caveat is that I don't care if it lacks emotional impact, because it was still so fun.