A super product !!! A great service: fastest delivery and exchange a super nice touch. We had only the little ball track and then regretted having not ordered the large. I advise necessarily to large, making the children's eyes even bigger - an absolute enthusiasm !!! To the roller equal to Kasper order rate with - great joy! I had rarely seen such a service experience - totally accommodating and straightforward. Here I would order again and again. The track has a very good processing and is also stable.