I could say a lot more than I've written here, but frankly I don't want to put in the effort (and honestly are many people gonna read this review and actually care about what I have to say? I have no delusions about that, so why put in the effort?), so let me give a very brief and incomplete explanation of my two-star rating.
1. Fischer spends a huge portion of the book addressing certain issues and principles--e.g. the Transfer principle--that I find to be distractions from the heart of the free will debate. Further, these distractions are pretty damn boring and a little too formalized (e.g. complex possible worlds analysis) for my tastes.
2. I have some problems with Fischer's account of guidance control i.e. reasons-responsiveness. I much prefer deep-self compatibilism (like Frankfurt's, Watson's, and Bok's) to reasons-responsive compatibilism.