We are taking a Princess Cruise in Dec. and our TA gave us the best price avail. I then told her that I had a $200 discount coupon from the Entertainment Book - and then we found out that also was only applicable with the Love Boat fare (which was a lot more than we paid). The only time my husband and I got a good deal with a voucher was through Carnival on a Class action suit. The first voucher they sent us was a 30% discount on full fare. We threw that away. A couple of months later we received a 30% discount on the best fare we could find and $50 apiece shipboard credit. That we used last year to go on the Carinal Spirit in Nov. 01.