The instrumentation in this piece is amazing. It fits very, very well with the theme you described in your comments, and the dynamics in this are, well, this is just top notch. This is probably one of the best songs I've heard in quite a while.
Melody/Harmony: Almost flawless, and for me to point out the small areas that weren't perfect would be an exercise in nitpicking.
Rhythm: Well, this song wasn't focused on that, but the melody carried the rhythm quite well, and it's a good rhythm.
Beginning and End: Perfect. Usually I can find one thing to criticize about either, but not this time.
Dynamics and Articulation: As I already said, you've done beautifully in both areas.
All in all, a solid 10/10 and 5/5, also a download and a favorite. Nice job!