This guide is more suitable for backpackers than day walkers looking for circular routes - unfortunately the blurb doesn't make this clear.
The guide follows the usual Cicerone format, lots of information on the area, its history, geology, flora and fauna, transport connections, accommodation and where to eat.
The routes are well described, but to my mind, there is a fundamental flaw. Most of the routes are linear, and although some help is given on how to get to the start of a route, there is very little advice on how to get back from the end of the walk, other than retracing your steps. Public transport isn't always suitable, so you would have either to leave a bike at the destination or take two cars. For a backpacker it wouldn't be a problem, because camping is a good option, and many of the walks can be linked up, but for ordinary pedestrians looking to return to their starting point the routes are not ideal.
Another problem with Cicerone guides is the maps. I like to see a walking route in the context of the area. The OS 50K extracts don't give a clear picture of the whole route. A different scale would be much better.
A further criticism is the lack of an index, which seems to be common to Cicerone, an astonishing omission in this age.
Overall, it will suit a particular kind of walker, but it wont suit the walker who wants to start and return to the same point.