It's a great account of Feynman, and comes off feeling like less of a facade than Surely You're Joking or his other autobiographical works. It's not a life-changing book by any account, but it's a fascinating read for any researcher; in my opinion, the history presented in the book is completely paled by the glimpses we get into the governing dynamics of Feynman's mind.
You're not going to learn any science here, but you might get an inkling into how to actually do science. And that's a wonderful thing.