Really good!
You know I'm composing symphonic music with Reason 3.0 and a lot of people saying to me that this program is not the platform for classical music. But I disagree. I make classical music with it and the piece you made here proves the programs possibilities in this genre.
The first that caught my ears is the... ehm... dulcimer? And I could hear that you wanted to achieve a kind of japenese feeling in this song with the flutes and the dulcimer. You succseeded - I think the song really has this mood.
Another thing: this song has a lot variety like it'd be always changing and don't have repetitive part - so great use of themes and instruments. Only some minor dissonance can be heard in the dulcimers melody - but that's not so disturbing. The gentle violin was also great sounding
Overall: great song, great composition. A question: did you use other refill sets than just the Orkester Soundbank? Because the sounds I could hear are all from there.