The Sansula has been around since 2001.  It is still a pretty new instrument and many people have never seen or heard one, but awareness is growing.  Peter Hokema, the German engineer who invented it wasn't much of a player.  People are still figuring out what to do with it, what is possible. 

For me the beauty is in the oval shape.  It lets one hold the instrument with the sides of the hands leaving the fingers free to play.  This is not a comfortable position for a rectangular kalimba, if you aspire, check out Chandra Lacombe.​

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​But the Sansula is a vibraphone, so it can do stuff these others can't, you just need to flip it over.  I discovered this while sunbaking on a beach in Mexico.  I didn't want to move so I played it on my stomach and Wow.   Look!​​​​​