Pros
You get paid minimum wage plus the standard delivery charge of about $1.25 per delivery. It works well if you can take several at one time. Tips are usually good in my area if you get it to them fast and actually have everything they ordered (its easy to forget a 2 liter if you have several deliveries). Our managers works with the drivers so they can have off whenever they needed to unless we are short on drivers. When closing I make a minimum of 40 dollars and I've heard many drivers making well over 100 dollars in a night.
Cons
Tips are variable to location and time of the month. They generally tend to be low at the end and beginning of the month. It does cause alot of wear and tear on your vehicle. Also it can be dangerous at night if you have to go into the ghettos. Houses with no address and getting lost is part of it but you eventually get that down as well.