It is not really a whole piano solo, a part of it are 2 piano's, and the 2 piano's are communicating to each other. The piano piece in art of life is really very important part from that song.
I really like it very much, because of its intensity also. I see a great mix of feelings in that piano part, love feelings, frustrating feelings, all sort of feelings are there in. Very very great to listen to it, but also you must LOOK to it, not only listen to it.
EDIT: I can't explain good in English for that piano piece, but it is really full of feelings, who make that I understand the musician, his love and his frustrations.