In 10 years of teaching English this is close to the worst book i've not only used, but ever seen.
I've had to use it for several CAE groups over the last 2 years. It is extremely ill thought out and poorly implemented. There is only one 'speaking activity' per 2 units and they are mainly vocab exercises with a small speaking component. The exam tasks are either absurdly difficult or laughably easy, but never actually at correct CAE level. There are many typos and other errors.
I could go on, but put simply it is a hateful book and one you should avoid if you want to have any chance of enjoyable lessons.
My students like the topics and the layout is good. The grammar and writing reference sections are very useful. For students actually taking CAE two Use of English sections have been changed and there are a few word number/time allowed differences.