This game has the perfect combination of indie storytelling and traditional GM driven narrative. I played it, bought it, ran it and it's become my #1 pickup game of choice. My hat's off to Murray & Marshall. The writing is excellent, the setting well described. The mechanics take a little getting used to, but players who have used the One Roll Engine or a number of collaborative systems will pick it up quickly.
The only aspect that I found difficult is the Teamwork mechanic. There really isn't a compelling reason for an agent not to concede to helping another agent. The example in the rules is that the agent in need uses the other agent as a human shield. If the helping agent can't be harmed then there's no reason for them not to help, even if they're being used as a human shield. I found that my players were offering assistance, which is the opposite of what the setting and system intend.