I bought this after watching some videos on YouTube. It is a truly beautiful instrument that is absolutely fascinating.
It is very easy to play and experiment with, there are a number of different sounds that you can get from the instrument by scratching, tapping and slapping. The scratchy sounds are contrasted by the very surprising deep bass tones
The overall sound is very very quiet and can easily be lost when playing with others, I would suggest purchasing microphones if you are serious about the instrument. Microphones can be very expensive and very difficult to find as the mic ports have a 1cm diameter.
My only criticism of the instrument is the ring that the instrument is meant to sit in. It doesn't work, the instrument is too top heavy for it to sit properly. It is not a major problem as you can play with it sitting on your legs sitting cross-legged.
For percussionists, especially tabla players and other finger played percussion this is a must. I absolutely love this instrument, it adds wonderful colour and surprising warmth to any genre of music. Beautiful.