The hoverboard was a birthday present, straight out the box my son had a go, he's used them before and is confident on them, he was riding along then the board started to judder violently and threw him off then hit the kerb. He got hurt but only abrasions to his arms . I had read the instructions and from that it said juddering/shaking may be cured by recalibration- although when brand new I would expect it not to need this, I followed the procedure (2 or 3 times) and it was still the same. The children tried it again and it was no different. So birthday present back in box and had to wait for me to get replacement the next day. I emailed as it was a Sunday but got no response. When I spoke to customer services on Tues 1 Aug they arranged collection but despite making it clear to collect from my home address the courier, UK Mail was sent to the wrong address so had to meet him (about 7 miles away) or ring Swegway again an arrange a different collection date but I had already taken today off so agreed with courier to meet him , he would not come to my address because out of his delivery area. So after all the above, as you would expect not happy at all.