I picked up an white aqua stripe zen, a natty zen (curently getting the Kayadama treatment) and a natty Shenzuh simply because I had never had or played one before either(and this appears to be the last chance to do so).
The Shenzuh looks very similar to a Royal kendama especially slip ring and base ring wise and plays similar too. It isnt quite as well finished as the Royal IMO but is a nice kendama for sure.
I put some tracking stripes around the hole and had a little jam with it, but I decided to give it to my 7 year old who has suddenly got back into playing kendama

(probably because we hid his 3DS as his ears had stoped functioning whenever he was on it!)