It works well for the most part, aside from one issue and one missing feature:

1. occasionally, the pop-up pin entry pops up but doesnt grab focus, so you end up entering your pin in whatever text field is selected, free for any onlookers to view. potentially a big security problem for some environments, or if your machine is compromised (in which case you're screwed anyway, might as well keylog)
2. no auto-fill hotkey means this is still more cumbersome to use than something like bitwarden, despite the additional features proton provides. ive grown accustomed to it, but i definitely miss that.

all in all, what's most important is that it works and is largely secure, and the proton team have done a great job with this password manager considering its youth and all the other projects they juggle.