Quick warning for those thinking of getting these as Xmas pressie. I had great service from Pro-jump, very quick delivery BUT....
You have to get them delivered to address on credit card - fair enough, but they arrive in a brightly coloured box with a big picture on the side. I had to do some very nifty footwork to answer door, sign for the package, get the huge box inside & hidden before seen by the future owner!
Be prepared!