Bought this to reinforce what I’m learning in class and like other reviewers said, the problems are worked out nicely and show a lot of the intermediary steps. I gave it a four because it only goes about two thirds the breadth of a calc 1 class and maybe one tenth the depth. The worked examples are are great, just very basic. It would be nice to see more depth at least, because someone is likely using this type of book to look at the more complex problems from a different perspective.