I checked out this book from my local library, and read it all. On the whole, if you are just beginning your journey of thriftiness and cost-cutting, it's not bad. It has some common ideas to get you started, and makes the thought and processes of cutting costs more "palatable" to the average upper-middle class people she aimed it at. But pretty soon, you start thinking "where else can I cut costs in my life? Where else is my hard-earned money being wasted?", and here is where the book stops being useful. At this point, you'll need to move on to some other books, most notably the Tightwad gazette, by Amy Dacyczyn (pronounced "decision"). There are also numerous resources on the Internet.
I would recommend this book to someone just starting out on their journey of thriftiness, or as a gift to a young married couple of middle-to-upper-middle-class background, who have never really had to worry about money before. It would not be very helpful to someone who is already a dedicated and experience cost-cutter/bargain-hunter.