We've used our Entertainment Book for several hotel rooms over the years. There are a couple different ways to book through Entertainment - "Guaranteed Best Rate" and "Direct to Hotel". I think only one booking method requires non-refundable payment up front.
Anyway, the Entertainment rates tend to be amongst the best...and I do try hard to find the absolute best rates.
Be aware, hotels have limited number of rooms available at that rate for any given date. You may want to get your quote then decide if it's worth buying the book.
If you are looking to buy a book for a vacation, you can purchase your local book...It is good for hotels nationwide. We have definitely saved way more than the price of the book on travel arrangements. There are usually coupons for rental cars, airlines and many, many others. If you buy your local book, you can take advantage of all the great local savings through the rest of the year - until November, 2006!