All the people running this place are friendly and customer oriented. They explained everything very well and set reasonable expectations.
We saw 5 manatees, including a calf, but the side excersion into one of the spring areas was pretty spectacular.
The full wet suit with a noodle at or below the waist made snorkeling for 2 hours easy. No fins allowed. Also none of the masks accommodate glasses, but my wife, who is pretty near sighted, had no problems without her glasses as the masks have 10% magnification.