It's handy to find a guide that focusses on these three cities without lumping them in with the south coast resorts. I hadn't used a Cadogan guide before and was pleasantly surprised. The book is light and portable - there are smaller guides, but you can still fit this in a small bag.
The text is easy to read and the layout accessible. There are nice colour photos at the front, which I think give a good representation of the region. There are no other pictures though, which is something of a shame. The maps are black and white but quite easy to follow, and cover a wider area than those in some other books.
The practical information is really quite good, even for an independent traveller, with more info on things like public transport than many other guides I tried. There's a general practical A-Z at the start and more specific information for each city. Focussing on just the three cities enables a lot more detail to be packed into a book of the same size as equivalents which cover the whole of Andalucia. However, information is also given on destinations that could be visited as day trips from the cities.
The language guide is another strength, being easy to read and comprehensive, although there are no phonetic spellings so pronunication can be tricky. There's also a handy menu reader, although this is located separately. I found the style of writing accessible and clear.
Overall, this guidebook is well worth looking at if you are visiting any/all of the three featured cities, even as an independent traveller. I would certainly look out for other guides in the same series having found this one so useful.