This is great.
I don't know why people had a problem with the intro, I thought it was very fitting. This is meant to be movie music, like, not a main theme I'm assuming. If it was played in a 'tense' scene, it would work nearly perfectly. The eerie low brass in the background moves the piece quite nicely. The end was lacking a climax, but then again I am hearing this out of its intended context (a movie). Around 1:37 when the oboe or whatever instrument that is comes in, it becomes really TOO quiet, and like I said there is no real climax and the ending is a bit short and dull. The only part I would fix, aside from that it's excellent.