Two minimalistic architects started this project, Halfbike, and it built huge fan base and stories. It is mentioned that it has a slight learning curve against your normal bike. It looks to take around a half of hour or so to get used to this new machine. OR?? it might take a week to feel comfortable.
If you are a real minimalist and trying to venture a new personal transportation device. It is worth while to give a try since I would like to give a try if I have a chance.