If you're thinking about it, just do it. It's a fun experience for natives and visitors. You will learn at least 1 new thing as the tour guides are packed with knowledge of the city. The bus is comfortable and air conditioned. You will have to pay for your own lunch I don't think anyone told me that until after we booked the tickets. It's fun to sightsee around Atlanta when you're not the one trying to navigate the traffic :)