Serious usability issues. It does not reliably open the website in the proper container, even when you check "Always open in Personal" option. The reason is because there is no way to manually specify which URLs go with which container. Instead, you have to check the box after the page fully loads to tell it to always open in the current container. You cannot always tell the current page to open in a *different* container. You cannot manually write a whitelist of which URLs go to which container.

The reason this is problematic, is because oftentimes, you will get redirected from one page to another after logging in. You'll open your Social Media tab, go to the site, log in, then check "Always open in Social Media". But then the next time you navigate to the site via URL or bookmark, it will open in the standard container because the rule was made for the signed-in redirected URL, not the original URL. You can't open the original URL in the Social Media container because you get redirected immediately to the redirected URL. And you can't open the original URL in the standard container and request to "Always open in Social Media". So, you have to open your Social Media container, log out, make sure the log-in page is set to "Always open in Social Media", then log back in. What a pain!