I've used and liked Favor, but once you add in a tip, and pay their percentage, it can get expensive quick ($5 per, plus 5% plus 20% or so for tip). So that can be $7.50 in delivery charges for a $10 sandwich. The upside is that anything can be ordered custom.
Does anyone know the logistics? For example, are the drivers stocked with inventory in their cars to avoid returning often to the restaurant? Do food delivery drivers ever also pick up passengers?