I had to read this for my linguistic anthropology class. While I find the class interesting, I also found the academic papers more interesting than this textbook.
It seems like every other chapter the author slams Chomsky. I got it the first time that you disagree with Chomsky's ideas on the origin of language; I don't need to hear it every other chapter.
Some of the social issues discussed were highly interesting; I just wish she had gone into more detail on those and less into theory.
Overall, if you're into linguistics, you might find it interesting, but I recommend reading some academic papers. The academic papers go into the heart of the matter by applying the theory discussed in this textbook.