I have been using Restaurant.com coupons for years. After reading a number of the reviews, most the the complainers must be illiterate. Come on folks, like any other coupon, you must read the terms. And if you did run into a restaurant that would not honor your coupon, I guess you should have showed the coupon before you ordered. I have found that some restaurants exceed the value of the coupon by including drinks and not adding the 18 percent tip.
I have only had one coupon that didn't work and Restaurant.com warned me in advance and offer to replace that coupon. So if you get taken advantage of by some crappy greasy spoon, don't go back, tell all your friends and post a review on YELP.com. You will feel much better and it only cost you $2 or $3. It will cost them a bundle in lost customers. Is it really fair to blame Restaurant.com?