I have been a big proponent of R.com for years, and have a bunch of $25ers that I've accumulated at $1 each. But my beef is that lately they have lost much of their utility. A couple has a hard time meeting the $50 minimum food purchase- or at least we do. There are still some with $35 mini, but those are like pizza or felafel or mom 'n pop Chinese joints. Ever try to eat $35 bucks worth of pizza by your selves?
We just used one in a tapas restaurant in SoCal, but when it was said and done we spent $75 after using the coupon. Darn good food & sangria though!