I just saw Bullet in the Head and I liked it a lot better than The Killer, but I wouldn't call it a masterpiece. Don't get me wrong, though, it's great. I guess that John Woo just isn't my style, which doesn't mean I don't like some of his movies, I just don't like them as much as a lot of people do. Back to Bullet in the Head, I'm glad I watched the longest version available because I'm wondering what the hell did they cut in the shorter versions, there isn't a single moment were I thought "this scene could go". Also, I hope that the alternate ending (the one that ends in the office) is the one that Woo prefers, honestly, I thought that the other one was awful. My only real problem with the film is the music, which I thought was so-so and this is just the kind of film that would benefit from a really good, really fitting soundtrack.
And my God, the POW sequence was really rough. A lot of strong moments in this film.