I've had my MGI Navigator about a month now, it takes some getting used to. I've dumped it several times mainly by driving it too fast. It's best to slow down considerably when encountering rough terrain or steep hills. I've also learned to remove the battery just before loading it in my trunk after a couple of instances where it started suddenly without warning and took off. It's easy to hit the start button inadvertently on the handlebars. I've also learned to extend the 4th wheel whenever I use my Navigator. I forgot a couple of times and the cart will fall over backwards when climbing steep hills if the 4th wheel is not extended. All in all, it's a great cart and performs as advertised when used properly.