"Excellent, well written and narrated biography"
Fantastic book. It is in a class with Nasar's A Beautiful Mind and Isaacson's Einstein: His Life and Universe. I only wish it when a bit deeper in the math and physics, similar to Derbyshire's Prime Obsession: Bernhard Riemann and the Greatest Unsolved Problem in Mathematics. Very listenable narrator. I enjoyed his impersonation of Dirac.
"Great information, weak delivery"
While I like the subject matter and feel that it is important, I don't think it offers anything new, nor does it deliver it in a particularly effective or enjoyable manner. I found it very similar to parts of the movie "What the Bleep Do We Know?" Also, similar information is available from Dwyer, Chopra, Myss, and even Brian Tracy if you venture to the business section.
"Maybe its working"
So far I have listened to this about five times. Often, it knocks me right out. Since listening I have noticed an ability to stay somewhat more focused at work. It may be the tape or perhaps work is more interesting. I remain sceptical. Nevertheless, I think at this cost it is worth a try and I will continue to use it, even if it really amounts to a sleep aid for air travel.