Essential.

If you have more than 10 pages on your site, you’re going to need redirects. This helps so much just for setting up simple redirects for stuff like /facebook to link to your facebook, but the 404 logging and redirect logging is great.

I recently found a redirect error I had caused by changing category/url structures a few too many times and the redirect-checker in the plugin page helped me find exactly what was wrong and correct it.

I’d only skip on this one if you have a better redirect plugin. I certainly haven’t seen one.