I had this hover board for 4/5 days. I had used it on the kart once on flat ground and ridden the hover board 2/3 times in the house. I emailed official hover board to let them know that it was grinding when in the house and loudly grinding when on the kart! It also started going crazy at one point and both plastic guards had popped up. After numerous emails they finally asked for me to return it. I also popped a note in the box to explain my problems. I then received a dpd notification today to say a parcel was on its way. I guessed it was this. But no email from official hoverboard to say what they have repaired ect. I have received my old one back with still the same problems- the plastic popped up. So basically it still makes noises and grinds and is not fit to use.