Been out and tried the air hawk,have to say i am impressed.It was more comfortabile than i thought,it did need a bit of getting used to. The trick is not to have to much air in the bladder ,just enough to give a small gap.It did not move around as much as i thought it would.The biggest proplem is when you accelerate,you shoot backwords which is a bit off butting.For just running about i would not use it, especially if i wanted to have some fun on the twisters,but on long trips and motorways it would help sort a numb bum.My mate has gave me some good advice, only use the airhawk on the last part of the trip not the beginning, becuse that way it helps to give you a new position and feeling, helping to make the last few miles more bearable.