Overall the book really fails to deliver. It goes through one small example and fails to go further in depth about how to write good cucumber "steps". The one example doesn't even seem complete, glossing over details of how the test user and the chef user group are related. It never explains anything about how cucumber-nagios works or how to use it with cucumber-chef. Te book might be ok for a manager to be sold on the value of applying BDD to an infrastructure, but beyond that totally useless if you wanted to implement anything. Too bad, seems like a good subject.