I love the tranquil mood at the beginning and the synths. The piece has a sort of soothing continuity to it which I really like. You also created a lot of space at times of structural relief, like at :55. It didn't seem that sad to me so much as reflective, though. It's so floaty, light, and trance-like, that it just makes me want to think deep thoughts. I love the atmosphere here, though. I would also like to hear the lyrics. If you're still interested in having a vocalist work on this, I might be able to step up despite my relatively limited experience. If I had to complain about something, it might be that the ending cuts off very suddenly, made all the more jarring by the fact that this piece is so smooth and comforting. Overall nice job! ;)