The build after the initial few seconds was, in a word, epic. The slow swelling around the minute mark when I hear things starting to patter around underfoot .. that's when it really opens up my imagination.
I would have loved to hear the chimes do what the piano notes started to do -- change up a bit. They were a good steady background to have, tying things together -- but not just for three minutes.
Ohh .. so chill. Gotta love it.