The build quality is not impressive compared to e.g. Lego or Playmobil - cheap plastic, but this was not a cheap price. Only one car is supplied - you'll need to own another two compatible cars to get some use. On the plus side, you do not need to own another track set. The car lift deflates too easily - it's hard to keep it fixed in place long enough for another car to trigger its descent. Cars fired from the catapult seem to roll too easily. Overall, the design is unimpressive. Bought it in response to a specific request for a Hot Wheels gift. Otherwise would not have bought it at any price over 8 pounds.
On the plus side, the four-year old recipient liked it from the start, as did his 2-year sister who seemed to be grasping the concept of cause and effect from it.