I liked the movie and the ending. I also agree with those that said Hanks did a good job. I wouldn't go so far as to say he is the best actor or the only one that could hold a movie together by himself but, he is damn good.
The ending, if they would have continued it any further (which is what I think some people wanted), it would have been total Hollywood crap cheese. Also, there is not way Hunt's character could have chosen to stay with him. see above reason.