Look for the coupon in hotel room's travel magazine for $2 off. The owner and driver were very nice and informative. The ride out was awsome and he actually parked the airboat and let passengers to get out and walked in the Everglades. He warned he cannot guarantee any sighting of the alligators but we were able to see at least three, close enough that we were almost able to touch it and took good pictures. After the airboat ride we were also given a chance to hold a baby alligator for picture. It was the highlight of my son's trip.
Overall I would recommend anyone who is interested in nature to get out of Miami city and try this. It's very reasonable price and educational.