To be sure, the book does have its strong sides, including good reviews of related work and an exposition of a particular multitape finite-state formalism that is detailed enough to allow the interested reader to implement it, and-if so desiredcreate a working morphology system for Semitic and other languages.
i would recommend it as a useful source of inspiration for researchers in the field, as long as their foreseen applications are unaffected by the criticism presented above.