This work contains selections from the most important Medieval scholars, including Maimonides, Avicenna, and St. Augustine. The selections are reasonably brief, so one may have to go read more works of some authors. However, that is the best one can expect from a book of this sort, and the selections are the best available.
Additionally, the translations are accessible to the modern reader. I had no trouble getting into the translations here at all.
On the whole, I think this is one of the best anthologies of the subject and would highly recommend it to anyone interested in the subject. Well done!