Instruct: Classify Amazon reviews into positive or negative sentiment
Query: derivative, but entertaining

This movie borrows liberally from several submarine movies that came before it (the director admitted as much in the commentary that it's an "old-fashioned submarine" movie.) Perhaps because I watched Run Silent Run Deep first, the duel with the destroyer did not prove effective to me. Since I saw Das Boot before, I was not as impressed with the part where the depth charges exploded around the sub. However, the movie still works for me. Conaughey did a good job here portraying an officer who was suddenly thrust into a job that he wanted so much, but was not well prepared for. The DVD comes with the director's commentary providing some nice WWII facts, and two short segments about the making of the movie. Good movie when you don't want to think too much about the possible plot holes or the absurdity of changing history regarding the capture of the Enigma crypto machine.