AFAIK, we don't have grocery delivery yet. I'd probably be a late adopter on that one as I'm used to wandering around the store figuring out what I want to eat. But we have started getting our cat food delivered. I hate going to the pet store for that. Only problem is with canned food and litter the boxes get pretty heavy and we feel guilty that the UPS driver has to lug them from the truck to the door. The upside with cat food delivery is that can sit on the stoop until you get home. With grocery delivery, you would need to arrange to be home when it arrived. (And unrelated bonus of having all the cats is we don't worry about recycling plastic grocery bags - they all get used as litter receptacles.)