I used this book to prepare for a doctoral level translation exam. Given that Spanish was the foreign language I've been learning from grammar school through college, it made for a conveniently concise review. However, it should be noted that this workbook contains many errors and typos, which a beginning student may not necessarily notice: caveat emptor.
Students looking for a comprehensive grammar review in greater detail should pick up En Breve: A Concise Review of Spanish Grammar
by Phyllis M. Golding and Seymour Resnick.
Though I did like that the readings are graded in difficulty, the readings did lack diversity in subject matter. Additionally, more difficult readings should be included in a future edition. Students can check out Cuentos espanoles contemporaneos by Juana Amelia Hernández and Edenia Guillermo for intermediate and advanced readings. (This book may be out of print: tracking down a used copy is worth it, especially for building your vocabulary.)
Finally, though the reading practice sections amount to a general "answer check" for the reading/translation passages, no language book should be without a glossary and answer guide.
Bottom line: If you've studied Spanish before - and remember enough to catch errors - this book is a great for a quick and clear refresher. If you are struggling with grammatical terminology, you may still like this book as a guide, but do proceed with caution (and the use of additional materials).