The discussion centers on the effectiveness of James Stewart's 5th edition calculus textbook. Users report positive experiences, noting that the book is straightforward and understandable, making it suitable for both engineering students and those studying mathematics. It is recognized for its helpful explanations, numerous examples, and effective use of diagrams to illustrate concepts. While the book emphasizes conceptual understanding over rigorous proofs, this approach is seen as beneficial, particularly for math majors who typically encounter rigor in separate courses. Some users mention that while the book is excellent for foundational calculus, additional resources or instruction may be necessary for deeper topics, such as specific integration techniques. The availability of a solution manual is highlighted as a valuable asset for understanding complex problems. Overall, the text is recommended for its clarity and practical application in both science and engineering contexts.