One advantage of using #AdGuardHome is that it provides statistics on the responsiveness of public DNS providers.
For me, #DNS4EU is by far the fastest (10 ms). Perhaps it's because of their geographical proximity, as they're also based in Czechia. The slowest has been #quad9 at 500 ms. I have no idea why.

I'm also glad to learn that DoH doesn't have a significant speed penalty. It's 12 ms versus 10 ms for DNS4EU. So you don't have to trade privacy for responsiveness.

What has been your experience with #DNS providers based in Europe? Do you have any recommendations? I'm interested in unfiltered DNS because I do the filtering in AdGuard Home.