Absolutely mind blowing/life-altering/amazing. I don't even know where to begin. The way every instrument fits together, it's like organized chaos, and it's the most beautiful thing I've ever heard.
Oh, and my favorite song from the album (although this is liable to change pretty soon):
When the solos start at :53 Mingus's bass line is like a fuc
king train. Man, after an opening like that if you weren't an amazing musician imagine how frightening it would be waiting for your turn to take a solo. I've been in situations like that and it definitely isn't a pleasant feeling haha.