I bought one for the first time in 2005. It's really easy to save the $20 cost of the book. I haven't struggled to try to use everything in there, and the thing is so massive that I'm sure I've bought/done a thing or few that I could have saved on had I checked the book first. But that happens all the time. Sometimes I remember to check on savings or point-earning stuff, and sometimes I don't or am in too much of a hurry. For Entertainment book, though, as long as you save the cost of the book you're still ahead, and I find it hard to believe you couldn't save the cost of the book fairly easily and quickly.