This product does not agree with the reference 33511. The locomotive magnet is not compatible with the wagon 33511. pity circuit. The locomotive cover is too fragile and too easily be removed. By dint he no longer holds. Finally the hands of the man who exceeds the locomotive will cling to the obstacles of the circuit such as bridges, tunnels and arches (reference 33253) derailing the train. My first disappointment at Brio.