In addition to the tip, which is important, customers are charged a service fee which varies according to the amount of the bill. I spent $125.and I was charged $11 and change for service fee, that's too much. Whole foods charges less than $10 fixed fee and the customer gets the items in a few hours. I've gotten my items with Instacart on the following day., Which I don't really mind, the service fee is just too much.