If you do decide to use this coupon, the Mirage Buffet was the only place where they enforced the "voucher must be removed from the book in the presence of a casino employee" last time we went. I'm sure other casino's do as well, but most seemed pretty cool about us just bringing the coupon.
While it's a pain to carry the entire book when you know which handful of coupons you might use, I can understand how with color printers it's easy to reproduce the voucher.