One of the first things I looked for on this site were purely instrumental beauties such as this one. So of course this has become one of my absolute favorites, especially since its so well done.
At first listen I was kinda turned off by the intro, but then I realized how well it built into the rest of the song. When the piano came in thats what really made me keep listening. Then, as djp noted, the percussion, which I especially like, comes in as one of the major highlights of this piece. A good job indeed.