I've used Wegoshop a few times and have recommended her to friends...
Marge is great... Always on time... Always what we want...
I can't remember what the delivery fee is off the top of my head, but I don't think it too much up and above the $17... If you keep your list flexible, and not stick to specific stores then she keeps the fee down.. I think she only has that in there if she needs to make "special" trips to specific stores that aren't normally in her route. With gas at over $3.00, I imagine that longer pick up routes cut into her margin..
I do tip her.. But I do it because of the exceptional service... Here's an example.. Once we forgot to pack toothpaste and a few other things... We called her cell at the last minute and she managed to snag them for us... Depending on how booked she is, she usually helps you unpack the groceries..
She usually offers 50% off the delivery fee if you need her to pick up something else later on in the trip...