This Impro session was really good.
Overall, I love it!
I have been listening to it since you uploaded it, it is really easy to listen to, and due to its length it doesn't even feel repetitive!
The change between calm moments and faster ones gives it good dynamics and allows to "wake me up" from the calm piano.
Since it is so long, I tried to make a list of the most interesting part for me and what I like about them.
18:30-20:00 Progressive increase in BPM
26:18-28:00: Calm atmosphere, gain in strength later
40:10-41:20: Favorite part, every time the music reach this part I just stop whatever I do and listen to it.
47:40-52:25: Everything is good here, feel like a story. special mention to 50:20-50:20 with the very fast succession of key
53:40-54:40: Very fast key again, calm and strong at the same time
59:54-1:00:50: Favorite part bis, sounds like overwhelming difficulty
Sorry that my English is too basic to really express my feelings.
I can't wait for the next one :P