I really shouldn't be reviewing this since I don't listen to this type of music very much, but here goes nothin'!
For a heavy metal song this sure starts out smooth-sounding. I loved the ambience of the beginning and the part close to the end. As for the meat and/or potatoes, the heavy stuff sounds good. You've definitely got the heavy metal style down, but it's got a unique sound to it I'd say. It's unusually airy and somber for heavy metal, and I love that about it. I do have to nitpick the ending since it just cuts out so suddenly. The ending is a very important part of a song in my opinion. You should let the sound die down before ending the file, but that's just my opinion. Overall, this is a great song and think most people would love it.
Nice work :-)