So far, I’m really impressed with how COSMIC is turning out. Depending on your use case, it might not be ready for daily driving, but it works perfectly for my needs. Its especially impressive as an Alpha, because it freezes up a lot less on me compared to KDE.
I have the Framework 13 and am currently running the COSMIC alpha on Pop!_OS. I love my current setup, but have tried Fedora Kinoite as well, and also had a great experience. Apart from running a few commands to get the fingerprint reader working, I haven’t really had to troubleshoot anything. Its been a solid experience from Day 1.