I saw this today. It's an absolute masterpiece, just like all of John Woo's films (although M:I-2 was boring, the last half-hour was great.) The best WWII film ever made recently, second only to Saving Private Ryan. Very accurate historically, and some of the most loud and satisfyingly powerful battle scenes ever made.
However, I still think that Face/Off is Woo's best Hollywood film, and The Killer is his best Hong Kong film.