I ordered this a few weeks before my French AS exam.
What I like the most about the book was that it gives many great linking phrases to use throughout your essays to make you stand out from the other canditates - yes, including the feared subjunctive!
It also includes hints of how to plan your essay well, gives many example essays to show you how it is done, and even provides lists of relevant vocabulary on certain topics.
Great to look back on whenever you're doing a french essay to get the most out of it - recommended!