I only saw TT11 test video of it. It looks convincing and 50EUR is not too bad. It's a pity they didn't talk about sponge hardness by degree nor it's mentioned on the package.
I'm also wondering who is the maker. Daiki? Fuso? Sumitomo?
I heard the name Daiki sometime throughout the review. Not sure though.
50Euro is not bad, but, G1 is 35$ on prott.vip, it is 40$ in my local shop and Gewo El Pro 48 is 30$ in my local shop (inters.pl). So... It does not give me that much incentive to try new rubber when my favorites are cheaper.