It's a double edged sword. There is the romantic idea that you make a shopping list and what you ordered arrives without you having to spend two hours shopping and driving for groceries. The reality is that sometimes substitutions are made without your approval and dashers try to "help" by asking you if you want something else that's "better" not realizing you have four kids and need 4 burger patties, not two oversized albeit nice patties, for example. So, unless you want your grocery shopping screwed up, you have to spend time talking or chatting with the dasher in order to ensure they understand what you need and want. Also, the app has preselected substitutions that you may hate, be allergic to etc. if you happen to be going abot your business (the whole point of using an app) while a substitute is selected, you get an unpleasant surprise and still don't have what you need. If you can afford a personal shopper you'd waste less using that method cause you'd have a real person managing the situation, not an app and there would be less mix ups. This is supposed to save TIME, and if I have to spend time hassling with mix ups it's a problem. I have also had drivers leave our food we ordered for guests we were entering at the wrong address and all they can say is "sorry". Imagine having a part planned and having nothing prepared for your guests and having to figure out plan b. To door dash's credit, you can be reimbursed for mistakes, and I have been. It would be nice if they can prevent these issues though as the app is supposed to add convenience to one's life. Also, please always tip your dasher if you can afford to. They can't possibly be paid well if you compare value of the order to time they spend.