Our daughter is thrilled to finally be able to turn the trains! And all the work so far properly, in particular those mentioned in another review problems with battery-powered locomotives, we can not determine the locomotives make good what they should. Durability of plastic parts: The course is still rough around the edges, but we have so our concerns ... But if you connect the switch directly to one another, two independent circuits are possible - this saves space and two locomotives can be on the road at the same time without risk of collision, what the fun factor significantly in our lifts! In order for the locomotives, however, again to switch to the next circle, a second set is required - a purchase that absolutely worth it in our opinion!