Tried accessing offer in the app (1/2 off breakfast items in month of March) Order seemed to progress normally until time to submit. Suddenly could go no further & couldn't back out/start over. Error "order cannot be changed b/c it has already processed" Restarted phone try offer again (visible on front screen but not in offers screen) put all this in app as feedback.. was unable to submit at the end.. Left completely hungry & sad. Maybe spoiled but I don't eat fast food who's apps don't work.