Faced with finding my first new job in 12 years, I bought this to be able to pass employer interview tests. All secretarial & admin jobs seem to need Excel nowadays, and you don't have time in a test to fiddle around to get the results you desperately need.
The CD is easy to install and the the format is great, an overview for each chapter to tell you what you will learn, a more detailed explanation of the functions of what you are about to do, and then the actual exercise itself to practise. It does however, forgets a time or two to state the obvious (switch window or something simple) which might be a problem if you are an absolute beginner. It was extremely useful as I found out short cuts and the proper way to use Excel (I have being doing things the difficult way for years).
It is a good refresher, but I think I would need something with a bit more depth around formulae writing - this area is a bit thin and I will be buying a book on formula.