Yes I had the Gtechniq on the Mini. From what I've seen so far the Gyeon looks class, real wet deep look to it.
The Mini was real easy kept clean so will be interesting to see how this is to live with as I'm all about minimum time washing and more time driving lol
I have gtechniq on mine and I have coated gyeon & cquartz uk onto others and I think I would go the gyeon route for myself next time!