Yes, I'm using it currently and have for over a year. It works well enough. However; The mobile apps haven't shown progress in over a year. Development on the main app is very slow. The browser extensions work, but do have minor quirks.

Honestly it feels like a dead project, It's not but it's lacking in resources and the devs are lacking in time from what I've been able to gather from the issue tracker. https://github.com/nextcloud/passman/issues I do sometimes worry I'm one nextcloud update away from losing access to my passwords as a recent one did mess with the interface a bit, it's still functional but some ui elements are mis-aligned.

I've been considering switching to bitwarden for a while, It's interface is much nicer, and more polished. I've mostly been waiting for one of the alternative API implementations to mature a bit, because I don't want to have to run a big honking MS-SQL container on my little VPS. I'm also going to have to write my own importer, or mangle the data a bit because the cvs format for passman isn't compatible with any of the import formats for bitwarden.

Or maybe I'll just give up and migrate to pass or gopass(https://www.gopass.pw/) worth looking at if you like pass). I think I want too much from my password manager =/