"it's a great set to build and the spinner on top and mechanics are good, but there are a couple of weak points where the finished item always falls apart. namely the two side engines split in two at the brown 2x2 square (with the stickers) very easily, irrespective of how well it is pushed together. Also the front window falls apart quite easily when it is opened for driver swapping. Also the item doesn't sit very well on a flat surface - really needs some sort of rear support to stop it tipping backwards."