Pretty nice...
The beginning was good, but when it slowed down it took too long to build back up again (it would seem less so if there was less silence between phrases and if it had a little more background ambience).
Then when it gets really quiet, that's nice... building nicely... (I'm listening as I review).
Yeah it built up nicely. Nothing to say now... still listening...
Quiet again... Nice change.
Overall, especially for a six minute song, this does a pretty good job of keeping your attention.
(I like the ending.)