There wasn't that many options to fit with my Quarq when I was looking at it.
It seems they are quite known by motorbike fans.
Their first cassettes were quite fragile a couple of years ago.
The ring works smoothly with the Eagle chain.
I even did a crazy 600km ride this weekend with it, with a freshly waxed chain and no additional lube.
But it is only a couple of thousands km old, so a bit early to know about quality.
They seem to take the bicycle gear seriously, I'm confident it is a good choice and start to put their rings on bikes I build instead of Absolute Black that clearly went through the roof with their pricing.
They are Ukrainian that moved to Poland by the way