Way too crowded for such a dangerous activity. If one person fell, there would be an avalanche of people falling. And falling in this activity means broken bones. There are too many people trying to hawk you their goods upon exit.
Went to 7 mile beach. The hotel we were in front of was very expensive. $10 chair rentals. Figure on spending $30 for 2 people to have lunch. More if you want alchohol.