I've been using this book to jaunt around a bit, and I've found the information, the directions, and the assessment of difficulty fairly accurate. I just got back from the Berry Creek Falls trail south of San Francisco, which was labeled one of the "prettiest falls" in the area. Not having hiked much in the SF area, I can't make comparisons, but I was blown away by the lush beauty and was glad I found it in this book.
Still, the book does not do justice to Southern California. Where, for Pete's sake, is Modjeska Peak? And there is no Mount Wilson listed, either under Mount OR Wilson. Christ. For twenty-five bucks, you'd think the the "Complete Guide to 1,000 of the Best Hikes in the Golden State" would not be missing two major peaks.
I blame myself, mostly, for buying this on-line. This is why going to an actual book store matters - a place where you can skip to a book's index and check its completeness yourself.