Edit: One huge plus in Bitwarden's favor is actually implementing 2fa in a way that makes sense. If you want to use a Yubikey, but then fall back to Google Authenticator, you can. Unlike Lastpass, where it's one or the other, something almost none of the other services I use 2fa with seem to restrict.

I'm giving Bitwarden a try as Lastpass drops the ball on Firefox support.

It's very clean, and quick. Parts of the interface are clunky (when you edit/save a new login, the giant green bar indicating that YAY YOU SAVED covers up ALL the useful buttons in the interface and doesn't time out nearly quickly enough, forcing you to click the X even to perform a simple task that shouldn't involve the notification.)

It's not quite as good at detecting login pages and offering to save logins as Lastpass. If you ever need to toggle away to, let's say, copy a Authenticator code the extension completely closes and you have to re-type everything, even if you were in the middle of adding a new login. So even if you're only half-done, make sure to save even if your new entry is incomplete.

It seems to especially fail to capture new logins if you have two-factor authentication enabled for your accounts (which really, you should, right?)

It would be nice to create a folder/category for your login in the very same screen that you create a new login. It's clunky to create a login, then toggle over to settings, create a folder, then toggle back over to your vault, and finally assign the login a folder.

The extensions don't sync automatically, or don't sync very often. Which means changes in your vault or in another browser don't sync until you manually click a button. That's an extra step that seems unnecessary.

That said, I went ahead and paid for Premium even if I don't plan on switching away from Lastpass. It seems like there's a lot of room to focus on exactly what used to make Lastpass great, before it started to get bogged down in sluggish UI and doubled in price without any real increase to functionality.