The KingSong ks18XL is 5 stars. The poor app brings it down a star. How can a high quality, high performance wheel have such a poor application associated with it? I hope the people who programmed the wheel are different from those who made the app. From my short time riding this wheel, I’d say the app programmers are a different lot. The wheel is so powerful and of very good quality. My only negative there is when I hit ‘kickback’, it’s a little jarring and surprising. Not really in a good way either. My previous EUC was the Inmotion V8. When approaching top speed on it, the wheel softly begins an oh so suttle tiltback. KingSong should try to replicate that. Having said all that, I feel that I posses the finest EUC made. Such a great feeling riding it. I’m a little obese and I live in the mountains. This wheel easily handles my weight. I found when I used DarknessBot app, it would alarm at 16 mph. With the app off I could do about 20mph. Battery supplies endless range it seems. The foot peddles provide s comfort I’ve never expected from an EUC! I just did a 13.8 mile run and later realized, ‘hey, my feet don’t hurt!’ Here is a sample of a ride on the 3rd day of ownership. https://youtu.be/c_TaPwQr8n0 I’m still restricted to 20 mph. I anticipate many years of fun from this wheel. Inmotion was a quality eweel but I’ve always wanted a kingsong. Now I’ve got the best EUC in the world!