Let me start by saying I am trained as a ropes course instructor and have been climbing and facilitating challenge course team building training for 20 years. That said, this zip line adventure is the best I've experienced! Even my girlfriend, who was apprehensive about the whole thing, agreed that it was by far the most fun we had while in Denali. Our guides, Colton and Ian, were absolutely great. Excellent guides and quite patient with the newbies. We would most definitely do this again!