Repost from December 2019:
I don't think you can go wrong with any of them. I would base it on: first delivery free (coupon code?), are the items/brands you want in stock, and are the right delivery windows available.
We used Vons several times before
Amazon came along. Then we tried Amazon a couple times and no issues. They did have an Uber/Lyft driver deliver the items at least two times (out of a car trunk), so I could see how care/handling might vary. I know Amazon does have trucks, this probably depends on order flow.
We switched back to Vons/Pavilion last time and I was impressed for these reasons:
1) You can start your order/cart well in advance and choose a delivery time. At Amazon, you can start your cart, but delivery window has to be within two days (at last check).
2) 1-hour delivery windows available at Vons. The site says this will be fulfilled by Instacart, but we definitely had a Vons delivery truck.
3) Vons now has real-time driver tracking like Amazon. It alerts you once they are en route and you have plenty of warning to meet the truck, if needed/wanted.
4) The Vons trucks are impressive, refrigerated, with serious infrastructure/crates. The driver was super nice and brought the entire order up to VGC on his own cart, not the bellhop. Amazon handed us a bunch of paper/plastic bags each time.
5) The Vons driver absolutely would not accept a cash tip, even after delivering to our fridge. I insisted three times, it wasn't happening-- strict policy. Amazon asks for a gratuity at check-out. I'm just amazed by that in a low-margin business in this day & age. Nice touch Vons.
Overall, all the services have improved their tech and delivery times in recent years. We used to always have it delivered before our arrival, but now with shorter windows and real-time tracking we usually order some alcohol, cheaper than nearby quick-stores, and plan to be there to receive the order. That is, as long as it works with our arrival day/park schedule.
One more thing to check is how much fridge space you have (full size in VGC), and plan accordingly (milk carton size, etc). Or, bring a soft cooler and use the hotel ice machine as needed.
Original thread with a couple more tips:
https://www.disboards.com/threads/online-grocery-delivery.3784212