Most groceries are bough weekly , so why is 1-day important for you? is it only for the times around the week that you miss some stuff ?
I love to order my groceries to be delivered, it's very convenient. But I generally fail to order them significantly far enough (24 hours!) in advance, and end up going to the supermarket anyway. I would love same-day delivery. Don't ask me the reason, because I don't know it!