Would you recommend buying Nathaniel Branden's 'Vision of Ayn Rand' or not?

Given Nathaniel Branden's history of dishonest attacks on Ayn Rand and Objectivism, would you recommend that anyone buy his "Vision of Ayn Rand"? (That's the book version of his "Basic Principles of Objectivism" course.) I've thought about buying it, but I don't want to support that man in any way.

http://www.amazon.com/Vision-Ayn-Rand-Principles-Objectivism/dp/098195362X