I don't know what everyone else thought but I found that although the Stage 2 booklet closely resembles some of the book, it provides the basic concepts in more detail and some more advanced stuff (and pictures!). And it's short which is a bonus when you find you've got lots of other revision to do (and probably a real job as well)!
For me, when I went to visit Scottish, I felt that I knew a bit more about what was going on and what I was seeing, and therefore learnt a lot more when I was visiting as I didn't need to have the real basics explained.
Don't know what others think...