Hubby and my son encountered this experience in 2005 they too booked with Sky sports. What I could remember is they were one of the expensive ones but like lynwestie stated it is the insurance that boosts the price up.
They knew what they were doing as well, whilst hubby was flying around waiting for my son to take off the mountain it appears that he was having a little difficulty with the parachute. My son and his pilot were just running down the side of the mountain to take off when part of his parachute collapsed. He immedialty halted the run as seconds later they would have been off the mountain and god only knows what could have happened. However, due to prompt action from the pilot they were made safe. My son was 16 at the time, this did not phase him as he stated that once that happened and the outcome was positive he knew he was in 'good hands'.
He was then able to fully relax and enjoy the experience. Funny enough we were only watching the DVD on Friday of them undertaking this fabulous experience. Although, I did not want to participate with them it was nice watching them flying around and even better when they landed safe and sound.
Enjoy it they most certainly did
Have a fab time
Kazee