It was definitely valuable to hear from so many leading investors in different fields. I appreciated that the author sought out some diverse voices in a fairly homogenous profession. The advice was largely high-level but still informative. 

At times it felt like these investors were crowing about their mass accumulation of wealth, and then justifying it by pointing to their voluntary philanthropy. 

Very slow,  mostly just a recap of his interviews.  I found the introduction and his thoughts on investing in the first section of the book to be the most informative.  Had a hard time finishing the book.