It quickly became apparent to me when I took this class that Diff. Eq. was past my level of competence in Mathematics; I got through the class by the grace of a pretty good teacher and some help from a classmate who had a better grasp of the material than I did (thanks, Renee) but I don't think that my problem was caused by any flaws in the book. As a result, while I'm not qualified to speak to the accuracy of the book, or the technical merit of it, I can say that in terms of following a reasonably well-organized format, and having few if any proofreading flaws in the writing, as well as a good variety of post-chapter exercises for the student, this is a very good textbook.