If you are looking at this book, you may have seen a previous review I wrote for the corresponding blue question book in this series.
Again in this book I found the material difficult to follow and not laid out in a very user friendly fashion. The explanation of equations was a particular weakness of the booklet. It is a booklet that is clearly geared towards the idea that a student has studied the material in depth, understands it and thus can get by on barebones notes. All well and good if you are such a student.
But cross over to other revision guides and the difference is staggering. "Testing your Higher Chemistry Calculations" is a wonderfully written guide on equations in Chemistry, written in clear lucid language and catering to all levels, from those struggling to those who are excelling. "Higher Chemistry Success Guide" give good summaries and practice questions, I also recommend "Bright Red Revision: Higher Chemistry".
Poor experience of this book overrall.
Try some of the guides I mentioned and also access the past papers on the SQA website.