we chose this model for his interesting description, especially the speed. And indeed, my 10 year old son found there a super fast car. The first concerns was held at unpacking: a wheel came off the car immediately, and the small room that locks the wheel was not apparently in the box (there watching several). Well after a little home repair, wheel stood roughly on the car. It worked very well about 2 hours (cumulative). The charging time is very short which allows very fast replay. By cons of a sudden, without shock, without reason, impossible to turn it to one side ... We already had a radio controlled car Revel but bought in a specialty store, and it's still functional, it is also why we opted for this brand. It seems that this product there is not satisfactory. We made a request for reimbursement ...