I wouldn't be without this guide and buy it every year. It contains well written, independent reviews, reliable taste, an eye for trends and the attitude that the guest comes first. The introduction sets out their loves (the personal touch, good cooking, individuality, warm welcomes) and hates (pretentiousness, piped music, individual jam portions, unfair cancellation policies). There aren't any photographs but if you read it you won't miss them as the reviews are extremely detailed. Much trouble is taken to give an accurate feel of the places listed (which include B&Bs, and guest houses as well as "hotels") and feedback from readers plays a large part in the book. Room prices range from around £20 - £300 per night but value for money is rated highly so most prices are reasonable. There are 6 vouchers stuck in the middle of the book which give you a discount of 25% off room prices for hotels with the voucher symbol next to their entry (e.g. 42 The Calls in Leeds). The guide is organised alphabetically by town and a useful section at the front recommends hotels for luxury, character, rural charm, seaside, walking, spa facilities, fishing, sports, children, dogs and gourmets among others.
I haven't found a guide which rivals this, the Which Guide takes a very similar format but doesn't read as well. Alastair Sawday's Special Places To Stay series has directed me to equally brilliant places, but doesn't always describe the rooms in enough detail.
Not every hotel I love is listed in the Good Hotel guide, I've been surprised by some of their omissions, but when I've written to them with suggestions I've always received a personal reply. This book's hotel reviews have been totally reliable, if you're going to buy just one guide - make it this one.