I tried it out today and it worked great. They call it "Instacart Plus" and it shows up as one of the store options in the dropdown menu, along with Trader Joe'

I tried it out today and it worked great. They call it "Instacart Plus" and it shows up as one of the store options in the dropdown menu, along with Trader Joe's, Costco, etc. The delivery arrived at 1:00pm sharp for the 1-2pm scheduled delivery window.