I installed both the Android app and the Firefox extension yesterday, migrating my data from Bitwarden (which I am keeping for the time being). Both products are functional and well designed, but I am giving "only" four stars because I expect them to evolve rapidly and become a truly exceptional password manager, as it happened with all Proton products so far.
A fully satisfied Proton Unlimited subscriber ;-)

Was using BitWarden, which is fantastic. But since Proton Pass came out, I wanted to try it since I already switched to use Proton Mail and Calendar. I like the idea of having "all my things in one place" (as long as it's a good place).
Both the app and the extension look good and simple. Exporting json from BW into PP had no issues and I have already used it on a couple of sites. I give 4 stars since just comes out (at least publicly) and devs don't get high on success and keep improving it :P but I can recommend!

I can confirm, that login is not detected on some sites. I can generate password at the signing up on site, but it is not saved by the extension..
My example is https://dotacjenaokna.pl/logowanie-strefa-dilera/

It would be nice if, when I create a new login manually, on the button instead of "Create login" there was simply "Save"

Great features overall, but seriously needs a form fill shortcut like Bitwarden has.

Great addition. While it is at experimental level, I am enjoying the basic functionalities. Keep up the great work!