John Taylor's "Classical Mechanics" is highly praised for its clarity and effectiveness in teaching the subject. A user reflects on their previous struggles with classical mechanics while using Fowles and Cassiday, noting that Taylor's book has significantly improved their understanding. After completing the first chapter, the user experienced a breakthrough in comprehension, expressing enthusiasm for the book's writing style and problem sets. The overall sentiment is that it is an excellent resource for undergraduate students studying classical mechanics, making it a recommended choice for those looking to grasp the concepts more effectively.