Good points: well illustrated, clear, written for UK readers so product/store references are relevant, some good tips.
Whinges and gripes: like an awful lot of framing books, it's aimed at mounting small scale works on paper so most of it is about mountboards, glass etc. I'm interested in making frames for my own larger canvas paintings and there is not much about that, especially floating frames for deep canvases (where there's a gap round the canvas) which are almost universal for 'modern' paintings in art expos but very hard to source, even at professional framers. (I end up making the mouldings myself with two battens from a timber store, it's a lot cheaper and you can use nice wood).
But overall, the book is still a useful reference and I'm glad I bought it.