I've been trying other ROMs but I always return to Pixel Experience. I've flashed the PE 12 a week ago and I believe it's a keeper for me. It even seems to have a better battery management.
I was a bit concerned about the bugs some people were reporting, but I guess I haven't found them.. yet...
I can unlock with my face (though it seems to be just a bit slower than PE 11), I can unlock with fingerprint even with the screen off, I don't use google pay so that one I can't confirm.
The only complain I have about Pixel Experience is the camera. I have the Gcam but it has some bugs. Sometimes it takes a bit too long to open and other times it can't connect to the camera. Not being able to use the slow motion it's also a bummer, not that I would use it often, but still.
I also have the Gcam Go for the quick action with the power button, not only because it's much quicker to open, but also because "normal" Gcam sometimes would have a black screen if it's launched the first time from double click on power button. I tried to install the anx camera several times, but I never had any success. It keeps crashing after the second, third... launches, removing permissions, giving permissions...
A couple weeks ago I returned to the xiaomi eu ROM, with its amazing and stable original camera, but the Xiaomi ROMs have too many quirks and I simply can't live with the battery saving features, always closing apps on its own, not being able to use gesture navigation with Nova Launcher, and the forced dark screen in every app.
Anyway, I rather have this stable, quick, clean, amazing ROM, with Gcam, than the xiaomi eu.
Thank you developers!