I thought the movie was good. I didn't enjoy it though, it destrubed the hell out of me. I certainly did appreciate the ending, as people pointed out it certainly was't typical Hollywood.
As far as the character played by Penn, he was an *******. I was left with a feeling of contempt for him, I certainly didn't think he was glorified. And as for the violence itself, the actual murder was reminicent of the knifing in Saving Private Ryan. Close, personal and intense. Certainly not the typical throw-away violence you see coming out of Hollywood.
JB73, you got anger management issues.