Airborne was great! I got a chance to go during my snowbird year (prior to my prosth residency training at Ft. Gordon). I went in February - It was balls cold and we weren't allowed to wear any long underwear. You do a lot of pull-ups and a bunch of running (really slow-pace though). The hardest part of the course is all the waiting around doing nothing. The entire class could have been done in about 4 days, but you have to stand in line waiting for 30 other people to roll around in the gravel. Any questions, don't hesitate to ask!