My almost 8 year old bought this with savings. He really enjoyed building it - it took about 30 minutes. It was quite a fiddly design but he likes a challenge.
However, he found that the stomp pad wasn't that great to use. You need to get the car placed just right in the tube for the car to move off after you stomp on the pad. Even then the car did not travel very far or fast. The car travels further and faster with a good oldhand push. I think the car's mass is too great for the air force used to prpel it. A bit of a dissapointment - the TV ads make the cars go really fast and look super exciting to play with - not the reality.
Still the car looks very cool - bit pricey like all lego for what you get.