Pros
I've worked for all the food delivery companies in the SF bay area and Waiter.com is by far the best. They take care of their employees (yes employee, not 1099 contractor). You get hourly pay, health benefits, food benefits, bonuses, tips, etc. It all adds up to be a very generous job. As long as you work hard you can work your way up here but there are some people who just show up and do their job every day as a good college gig. There's a lot of people who have been working here for years and I can see why.
Cons
You need a car/truck that gets good decent mileage. My truck gets around 23mpg highway and it works out OK. Eventually I plan on buying a Prius and the gas savings alone will pay for the monthly payments. Also, be honest with your insurance. Your rates will go up, but make sure you are covered.