It's a short book - 50 pages - that serves as a good introduction to Fate gaming concepts. I've read both this and (most of) the full Fate Core rules and I'm intrigued. Fate is a very loose and story-oriented system, in contrast to what this Old School Gamer is used to, but I think it would make for fast, fun play. This book itself is a little too short - I'd like more examples of the concepts at work, but then that's what the full Fate Core RPG manual is for.
Also, I really like Evil Hat's aesthetic. The product has a fun, pulp adventure, cinematic vibe to it that seems open and inviting and welcoming of newbies. I like that maybe as much or more than the promise of the system itself. But Fate is certainly a fresh approach to RPGs and worth checking out.
And with a lot of their products Pay What You Want on drivethrurpg.com, that's pretty easy to do.