Start now by the point that angry: The tabs to fit the pieces together are too fragile. So much so that especially for élèments of looping, it borders on the manufacturing defect: They snapped the room from dismantling, and without forcing. The green elements which theoretically allow branching from one track to another does not work or I did not understand the principle. Elements that can support rails and which are expected to follow suit below does not fit: The receptacle, a small circle of soft plastic gives systematically. I have not managed to place would be this one. After mounting the entire circuit, placed some items in random gravity, and found the weakness of all, I withdrew: Looping: On one hand it is not very solid, other than children are not able to speed up front and then slow down to use it well. Green bifurcations: The car stops automatically at the point of separation of the way, it ends up excited. It remains a circuit reduced to its simplest expression in the form of zero, having only used the black rails.
Highlights (yes there are): The cars are all cute and very friendly. They perform well on the rails and with an average dosage of the speed remain in place without departing from the lane. On a simplified circuit, the children play: Fortunately seen setbacks recorded in advance! I plan to stick the black elements on a wooden tray to simplify installation and prevent other tabs continue to break.
Finally, proper lightened circuit without being exceptional but intrinsically poor quality. Price is greatly exaggerated (even if found on Amazon is best observed). Having said that children love so Mario, Luigi and Princess circuit that good, I do not regret buying so far, I would have just enjoyed sufficient quality so that the pieces do not break in the first installation.