I have one that I bought several years ago just to see how they ride (I own the Origami Bicycle Company and sometimes purchase competitors' products for comparison). I think that the geometry takes some getting used to, but I just didn't put in the effort to reach a comfort level. Its now collecting dust.
The concept is really cool, and the quality is very good. Overall, its a very interesting approach.
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Paul Pinigis
Owner of Origami Bicycle Company