When it works, it works well. However, it has two major problems:

1. Frequently just stops auto-filling entirely (only on Firefox, I have not noticed this problem in Chrome). No idea why. The extension is active and I am logged in. Sometimes restarting Firefox fixes it, sometimes not. If you contact support, they say "reinstall the extension, reset your browser to factory settings, etc." Sorry but those are not acceptable solutions.

2. The sync between devices seems either broken or much slower than it should be. If I add a password on my phone and then check in this browser extension, the new password is nowhere to be found BUT if I log out and log back in, it appears. Infuriating.