My main reason for switching away from LastPass was that Bitwarden's UI was much better looking. It's been working great for me since then (even after switching from Chrome to Safari).
During this process, I also cleaned up my vault (some accounts had very long URLs saved as opposed to the base domain; e.g. https://www.foobar.com/signup&method=blah... => https://www.foobar.com) and discovered that a bunch of my entries had either empty usernames or empty passwords.