Overall, I have had a very good experience so far with one-on-one classes. We have moved at my pace while the teacher makes sure all points are covered. I don't think the text book is very good, since it requires the MKS worksheets (good) and teacher explanations to make any sense of it. For that reason, I wouldn't consider a group class with this book, but for one-on-one, we just used it for exercises.