Instruct: Classify Amazon reviews into positive or negative sentiment
Query: a big disappointment

I bought this book based on reviews on this site and others. The descriptions are better than average, but the maps are of poor quality. Sorry, but good maps are ESSENTIAL for hiking in unfamiliar places! I've seen better maps of neighborhood walks in Frommer's and other general-use guides, and the maps of the trails in the SF part of the Golden Gate National Recreation Area (specifically the Coastal Trail), which were what I bought the book for, were inadequate. From experience, it is not good when you are reduced to hiking with a book in one hand for the description of the trail, because if that's all you have, you'll get turned around at some point. I'm still looking for a better guidebook.