Works well for the most part. The biggest problem I have is it will sign you out on occasion, I think after roughly a month, but the extension icon remains as if it were still signed in and connected. Pretty hard to protect your privacy when you get signed out without your knowledge or any warning.

Update: Looks like they may have updated the extension to show you're not signed in. But now it seems to have trouble logging in, or at least showing that you're logged in. I'll go through the login flow, wait a little and check the status in the extension, but find that it's still asking me to log in. Sometimes it resolves itself, sometimes I have to remove and re-add the extension for it to show properly.