They always get the best looking ones. Plus if you get substitutions, you always get something bigger and better...Do the pickers get nice veggies for you? I'd be afraid of getting bruised and old veggies that way.
Last time we did this I ordered sliced cheddar cheese in the dairy section for everyone's burgers and they gave us a package that lasted almost a whole month

they don't charge you either if they have to do a substitution and it cost more, they just change it to the cheaper price! It's an amazing service.
I have a $10 off coupon that I use every time I go and it basically takes off the taxes because that's usually $11 or something.