Service of ewheels is phenomenal! I bought an MTen3 almost a year a go and now had a weird problem with it flashing without ends. I contacted them for help and got an immediate repsonse an hour later that they hadn't seen this kind of problem before. They contacted Gotway for this and upon their reply sent out an replacement controller board. The board arrived at my house at no cost within a week. Turn around time from problem send to solution in less than a week is pretty amazing. They even helped with a problem I had with a MSuperV3 I didn't buy through them. Obviously I didn't get the same superior treatment, but got quick helpfull answers to my problem.