My physiology professor gave us a choice between 3 different textbooks because, in her words, it's all the same. That may be so but there is a world of difference in writing styles and organization of material. I read Tortora's Microbiology text in the past and found his writing to be easy to understand and straightforward. So I went with this textbook and it's been invaluable to me. This book goes in depth into anatomy and physiology. I didn't really need the anatomy portion of it for my class but I was glad to have it there for review. There are a lot of colorful diagrams, illustrations, and tables that organize the material in an accessible way.
I've read textbooks in the past that jump from one topic to another and they don't always bring the material together to give you a better idea of how one process in one system, is important in another system. Tortora's logic is organized neatly. He does a great job at offering basics, building on them to explain more complicated processes, and reminding you of how they interact with other systems. I found that to be extremely helpful when dealing with the nervous system, which is several chapters long. In all, Tortora did a great job at putting all the pieces of the puzzle together for me.
The material is challenging but thankfully Tortora's writing style makes it entertaining to read and easier to understand. I would highly recommend this textbook and would also advise you to visit the publisher's website because they offer flash cards, diagrams, and practice tests that I found helpful when I needed to study for exams.