Anderson has an interesting take on "free" that is sometimes dead-on and sometimes off-target. Overall, he does a good job describing the different approaches to "free" and gives a good argument for using "free" to grow sales. At times he tips over into fantasy land, but the bulk of this book is informative and well worth the listen.
Plus, it's free...
I still learned some interesting things, and it was entertaining to look back and see what occurred after the publishing of this book, but a lot of the examples have already become outdated. References to Netflix DVD rentals (all but dead) and discussions about sites like MySpace and Digg really date the book. Information regarding theory is still mostly valid, but I constantly kept thinking about how dated the book was and inevitably questioning if it really was still valid because of it.
Fascinating subject matter with a strong amount of data to back up his claims. Anderson does a great job of encouraging the reader to explore the edges of their imagination with how the "free" model could actually create profit. While Anderson is a good reader, this is a book crammed full of information that you may need to listen to multiple times to fully work through all that is presented.