We have used them, wonderful service. When you order on line there is a spot for instructions. I just put on there to leave with bell services. When bell services receives the groceries they will refrigerate anything that needs to be kept cold. There is also a place to put a tip when you are putting in your order.
When you are in your room, call bell services and have them deliver the groceries to your room. We tip bell services as well.
Put your order in early. They only deliver a certain number of orders per day and I have read of people not being able to get delivery if they are all booked up.