That autobiography has inspired more non-jazz people I know to investigate jazz than anything else I can think of. It's so hard to put it down. I've read the book probably 10 times, just by opening it up to random pages over and over again over the years. It's not always pretty, but it's fascinating.
Miles is my favorite jazz musician. His bands were so, so good. And yes, his influence is just ridiculous. All the greatest players came through his groups. He broke new ground and led the way that others followed. For me, the pinnacle of 20th century music was the 60s quintet with Wayne, Herbie, Ron and Tony. I have all the studio and live work that band did and it's the most compelling music ever recorded, for my money.
The only artist who approached Miles in terms of turning out talent as a leader would be Blakey, I think.