These guys are the original boot camp in Atlanta, and have several locations. They limit their groups to 35 people, unlike other camps that just pack them in. Instructor to student ratio is very favorable, somtimes 1 instructor per 4 participants.
I did the camp back in 2001, again in 2003, and three times since. They are great with beginners, and also challenge fit people. They have an atmosphere where everyone is made to feel comfortable and they treat everyone with respect. Most of the other boot camps around town were started by former instructors and students from this organization. Boot camp programs can be expensive, and this one is no exception -- but the results are better than a personal trainer that costs much more. Buying a cheaper program may give you poor results.
Pros: Great results, nice people, they are firm while being nice and helpful.
Cons: You can get dirty during the workouts, and they expect you to show up
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