When examining this a book for adoption consideration, my primary concern is how easy it will be for the students to read it. This requires that you intentionally dumb yourself down, reading the explanations in detail, looking for simplistic clarity. If a book has that feature, then it is most likely a good choice. With the exception of including solutions to a large percentage of the problems, all other aspects of the book are secondary. (I consider the lack of solutions to problems in a math book to be a fatal flaw.) In general, I consider the inclusion of more problems of the same type to be trivial padding; after all, the value added by including ten more routine matrix addition problems is minimal. In finite mathematics, it is possible to include problems based on circumstances that actually occur in the real world. The cost of manufacturing some items is in fact locally linear and the allocation of resources can be described by a matrix. Therefore, the realism of the applied problems must also be a consideration when examining a finite math text.