I have bought two of these over winter and have about 2000km on each of them. Here is my experience.
After about 1000km they became noisy, and started to make my bike sound pretty cheap or like the chain wasnt lubed ever.
And now, after about 200km shifting is very off. Sometimes on a downshift and sometimes up. It will start to skip cogs, not catch etc. Replacing back with Shimano over the weekend.
At this point I am down with these light weight cassettes AND the carbon chainrings. Nothing comes close to even basic 105 for durability and pleasure of use.