Ben Goertzel's review in H+ Magazine. Excerpt:

The booklet is clearly written -- very lucid and articulate, and pleasantly lacking the copious use of insider vocabulary that marks much of the writing of the MIRI community. It's worth reading as an elegant representation of a certain perspective on the future of AGI, humanity and the world.

Having said that, though, I also have to add that I find some of the core ideas in the book highly unrealistic.

The title of this article summarizes one of my main disagreements. Armstrong seriously seems to believe that doing analytical philosophy (specifically, moral philosophy aimed at formalizing and clarifying human values so they can be used to structure AGI value systems) is likely to save the world.

I really doubt it!