It helped clarify some thoughts I'd already had about free will - that the standard paradox of free will as incompatible with determinism was not a true paradox. I think the concept of free will used by many people is horribly confused and this book is the best attempt I've seen to come up with a coherent conception of what free will can mean in a purely material universe.

Same and same. Recently, Dennett has been good on memes, but elsewhere he does tend to waffle a bit. In Freedom Evolves, Dennet redefines the terms he is discussing, berates everyone else for not using his definitions, and then bangs on about them for hundreds of pages. That's philosophy for you.