The theory is written with different words than those in the book. Of course, the way it analyzes things helps quite a lot with understanding. If you want to pass with a high grade, you will need to learn at least the definitions from the book. There are quite a few mistakes in the exercises and there are some few additional references to theory beyond those in the school book. Maybe this is to help with understanding, though.

It has many exercises such as multiple choice, true/false, crossword, fill in the blanks, etc

Unacceptable the fact that it has WRONG which blood groups can give to which. It states, in the exercises and criteria, AB as universal donor and O as universal recipient, while it is EXACTLY the opposite. I hope it hasn't misled children because of this UNFORGIVABLE mistake. I hope the book will be corrected soon in several areas, as it could be very useful in a subject where the textbook may be the most poorly written in the world (e.g. the anatomy of the heart diagram could be much better if given to a preschool-aged child to draw).

The majority of the responses it gives are incorrect. Avoid it during national exams! It is also poorly written because it has the same answer for two different questions

Good job, considering it was the first aid that came out for the lesson. Definitely better written compared to the school one (which is downright garbage), it is interesting in its exercises and provides plenty of topics for practice. However, it could be better in terms of visuals, as well as providing clarifications for things we read. It moves more like theory parallel to the school one and rarely gives a clarification (except maybe for the curriculum, but of crucial importance for understanding).

Overall, I would recommend it purely for the overly analytical tables and the variety in exercises. It is ideal for someone who has memorized the theory and wants to practice. It definitely won't help someone who wants something extra for body function.