I got the woow effect!
I really like the superposition of so much small sounds!
Just on comment: at 2:30 you make us wait for something even bigger than the beggining with everything that we heard before at the same time, and it's the disappointment: there is small 2:31- 2:38 part (with is cool but shouldn't be here I think) and then same thing than before :(
Great work anyway, 3:40-4:20 is great!