Splendid

Very nice job. I'm actually a Lost fan myself, so it was neat to hear this piece. Michael Giacchino is a genious!

Very well done

I really enjoy the composition!
Personally though, I find the drums are a bit too loud. I think they can easily support the beat while being significantly lower.

Nearly perfect!

I love this piece for it's simplificity, and how I for the most of the time actually could see it play out in the background of a movie.

Voted 5/5 and 9/10 on this review. The last missing point is for a very few places where the notes become a little weird and unexpected. This was especially around 1:40. Might be intentional, I dont know, but for an ambient song they require a lot of attention, because you go: "What happened there?"

Under all circumstances great job! :)