Onewheel owner with about 100 miles ridden chiming in: I think it's a great way to have fun, love riding mine on trails and on short trips for takeout, feels so similar to snowboarding to me, but a terrible choice for commuting. Expensive, short-ranged and slow compared to say, an e-skateboard, e-scooter, or just a bike (electric or not).
I fully agree with whoever told you that the automatic braking is dangerous on downhills, that has been the source of all my scariest Onewheel moments and now I don't go above 10-12 mph when riding downhill, which of course is much slower than a safe downhill speed on a regular bike.
I fully agree with whoever told you that the automatic braking is dangerous on downhills, that has been the source of all my scariest Onewheel moments and now I don't go above 10-12 mph when riding downhill, which of course is much slower than a safe downhill speed on a regular bike.