GrubHub is totally incompetent and unreliable. I had a coupon for $10.00 off, and they suddenly decided not to accept my credit card. You can only use a coupon if you pay with a credit card. They said that my bank tells them that my zipcode is incorrect. I haven't moved, my zipcode hasn't changed. Grub Hub had taken this credit card in the past, but all of the sudden when I have 10 dollars off my zip code is wrong. Pretty convenient. I will never use them again and I strongly advise everyone not to.