I've seen one in person, though it was some time ago. I remember thinking it was a well-finished piece in terms of case and dial. Surprisingly easy to tell the time with the single hand once you get used to it - which for me was a matter of minutes. I felt then, and still feel now, that the single hand was a difference for the sake of difference alone, with no real benefit. It's the kind of piece you might want to add to an established rotation just for the sake of variety - but consider whether the aesthetics and technical merits of the piece will endure once the one-hand novelty has worn off.