I know many people depend on Carbs and Cals. However, I found it a pain. The pictures of plates of food are unclear of the size of the plate and rarely represented the types of meals I ate. And I spent so long going through the book to find (or not) my meal, the food was cold.
I prefer to use Google and type "carbs in...".
Over time, I have got used to guestimating most meals and I am happy with this approach.
We are all different but, if you can borrow a copy, I would try it out before spending money on it.