They are intriguing, I have all types of bicycles, never had one of these. From some of the vids, the performance is impressive, and they have strong frames that look like they would hold up. I have to walk from plant to plant at work and this would come in handy. They're sold out all over the net, and some are starting to mod them already so they may be starting to become popular. I also like the idea of being able to have one in the trunk to do some exploring any time.