They charge a service fee which does not go to the driver directly, which looks like a tip that is not a tip. To tip drivers, you need to go specifically and click on service fee, change it, and tip the driver. Additionally, there are frequent errors in shopping as well as order "rescheduling" at the last minute. They advertise same day delivery and have you schedule times, however they often can not find a driver. You can order 6 hours in advance and be notified during or after your order was supposed to arrive that it can't be delivered, and you are given no recourse. For those who are homebound and/or are counting on this service, it is a huge problem. When we called to speak with customer service you could hear them smirking as they pretended to care that they messed up.