We ordered two hoverboards with hoverkart attachments included and have nothing but problems, both with the hoverboards themselves and with their customer service. The hoverboards we purchased on the website stated a top speed of up to 15 KM/H but the device we received states it is only up to 12 KM/H. The website also stated that the minimum user weight was 30KG but the box we received clearly states a minimum user weight of 40KG on the side. The hoverboards will occasionally turn themselves off, leaving a child drifting with no way of controlling anything. As a result of this my son bumped into a kerb which bent the flimsy metal on his hoverkart in two. We have had hoverboards previously which were much more responsive that these. There is a noticable delay when leaning to the hoverboard actually responding which makes them very difficult to control. The battery on them barely lasts an hour despite being advertised as lasting up to 2 hours. Despite all these problems they are refusing to issue us with a refund, instead requesting that we return the devices so that they can inspect them.