I get lots of Cloudflare authenticators, some Youtube content gets blocked, and a few sites will not load at all. Reddit (which I avoid as often as possible) blocks it completely [1]. Switching to a different country sometimes works but increasingly does not. I don't use streaming services apart from Youtube.

Still, I am happy with the service and will continue to use it.

Edit:

[1] As others have written below, Reddit blocks when not logged in. Since I don't have an account, that's a 100% block rate for me.