I read this because I read a couple of other "great CEO" books (Steve Jobs and Jack Welch) and really enjoyed them, and thought I would be remiss not to read about Sir Warren.
I hemmed and hawed about whether to go abridged or unabridged. I generally shy away from abridged books, because then you don't know what you've missed... but then again, 37 hours of one man's life seemed like a lot...
But I dove in and purchased the unabridged version, and never looked back. This is a very thorough picture of a uniquely gifted man, told in snippets organized to keep it interesting so there isn't too much time spent on any one part of his life. I have read other comments that people would have preferred not to hear as much about the other people in Mr. Buffett's life. I, however, found the company he chose to keep (or NOT to keep) an interesting part in assessing his total character.
In addition to an account of Mr. Buffet's life, it is also a fascinating "history in business", with much of it happening before my time (I'm in my mid-thirties).
The narrator did the right thing here: made it very listen-able without intruding.