I bought this guide in advance of my first trip to the Peak District, not knowing where I would be climbing it seemed to make sense to have a guide covering the whole area as opposed to one for a specific crag. Having now been out climbed there, and used the guide, the thing that strikes me is the extent of the climbing in the area, and the number of different guide books available. The bigger crags have there own definitive guide which lists just about everything and they are sizeable books in them selves, so it is not surprising that as a guide to the whole area a lot of routes are missing from this book. But you have to make a choice over carrying and buying a pile of guides or having one that will cover the area but miss out on quite a lot of the climbs.
If a general guide to the area is what you want then this is a nicely produced book, the climbs are easy to find from the excellent detailed crag photographs, and the routes marked with a dotted line, so much so that the verbal description is almost unnecessary in many cases. A nice change to some cases I have had where I have desperately tried to make a verbal description fit a climb only to find I am on the wrong one!
This is a nice general guide to the area and personally I would probably get this guide again. Any crags that really interested me which I wanted to spend a lot of time on, I would then get the guide to that specific crag to cover everything there.