Absolutely a must have add-on if you use reddit, period. I can't use the site without it.

This is a must-have if you regularly (or irregularly) go on the front page of the Internet!

I recommend this if you are on Reddit regularly. The only problem I've had with it is the account switcher. It seems to work with the old layout only with the Firefox version of this addon. However, you can easily get around this using another addon by Mozilla called 'Multi-Account Containers'.