Purchased the Hoverboard with the kart for my daughter for Christmas. Absolutely amazing! Easy peasy set up & charge. Once charged, it lasts for days. Let’s you know when it needs charging again, by beeping. Smooth easy ride, with no jerks or rumbles. The kart was easy to set up & attatch to the board, easy to take back off too. The kart also gives a smooth easy ride. The Hoverboard came with Bluetooth, once the iPad was hooked up to it, it is really quite loud! Music isn’t distorted either. Over all my daughter loves it & is 10 out of 10 recommend to anyone looking for a Hoverboard or a Hoverboard & kart!