First the good bits: this guide is strongly made and well bound, the pictures are good quality and the mapping is first class. The maps are based on OS Explorer series, surely the best there are. The background information on the Downs is OK.
Now for the bad bits: there is a lot of extraneous matter that few walkers will need - circular walks etc - and the written route directions are truly dreadful. Instead of actual distances - eg turn left at the junction in 400 yds - it uses useless words like "soon" or "shortly." The word "soon" can mean any distance from 25yds to well over a mile and I ...soon... came to dread it. Where distances are used they are frequently inaccurate - one distance quoted as 100yds turned out to be 1/4 mile! Also many directions are complex, badly worded and very hard to decipher.
Overall this is not a bad guide but it would be so much better if (a) the background and other extraneous material were separated into another book or part book, and (b) the route directions were completely rewritten.
Buy it for the maps, if you buy it. The waymarking of the Way is pretty good and with them and the maps you can, as after a while I did, manage without the route directions altogether.