I have 4 of the ZTTO 385 gram Micro Spline, 12 speed, 10-50 cassettes in service, all running KMC chains and Wheeltop EDS OX derailleurs. (I was one of the first purchasers to start using the Micro Spline version when ZTTO first introduced them. I was told by them that the first 2 I ordered were from their first manufactured batch.)
The oldest cassette has 3000+ abusive miles on it and is still working great.
The other 2 are on bikes I ride a lot less.
The 4th is on a spare wheel.
I also have 2 Scumano M-8100 10-51, 12 speed, cassettes on wheels that I swap out on a couple of my bikes. Amazingly, I don't have to re-adjust my Wheeltop EDS gear cog/shift positions, and I can't tell any shifting differences between the ZTTO and my Ultegra cassettes. (Other than having a 51 versus 50 lowest cog.)