On almost every page of this book, I encountered an something which caused my to spontaneously exclaim "exactly!" or "Wow!". I'm wrapping up my masters degree in Linguistics, and had still not found a theoretical framework within which I would have wanted to do research. My exposure to mainstream generative theories (mostly GB and Minimalism) had left me with an empty feeling inside as well as a great number of nagging suspicions that something was fundamentally wrong here. I was starting to turn into a boring anti-Chomskian and was reading up on every lesser-known grammar theory I could find in hopes of finding confirmation of the ideas of language that were starting to take shape in my head. I was also totally perplexed as to how grammar theory was supposed to integrate with psycholinguistics, neurolinguistics, and evolutionary questions.
To make a long story short, reading this book amounted to the experience of having a premier linguist with decades of professional experience at the forefront of the field say: "Your suspicions are justified, you're not the only one with these questions, here are some possible answers...", and then lay out a theory that convinces through its clarity, descriptive and explanatory power, and psychological and neurological plausibility.
A side effect of reading this book is that I realized it is possible to be a nativist and a proponent of UG in spirit while also embracing advances made in connectionist, probabilistic, and statistical approaches to processing and language learning.
Thanks Ray!