My son (13) and I loved it! Out of all our activities on our 16 day vacation, this was by far our most unique activity.
Calvin, our guide was great. He was very knowledgeable and entertaining. We loved the part where we turned off our head lamps and the cave became pitch black. The one negative that I must say is that they should use Febreeze or soak the helmets in bleach. The helmets smell of sweat. Overalls get washed, so should the helmets.