This is a good song.
I don't know how else to put it, it's just a great song. Relaxing, melodic, two great elements of a slower paced, calm song. I really don't know how it could be improved more, other than maybe, in my opinion, add a few more background strings or wind instruments (cello, violin, a low pitch flute, ect.) to make the song a little more atmospheric. Apart from that, it is a great song.
Please contact me if you would like to use this in a project. We can discuss the details.