I have a website that is filled up by affiliate links.
Few hours ago i discovered that the nofollow plugin i was using did not apply a nofollow to all external links. I also discovered i had a google penalty. So, i think that my past no follow plugin (it was WP nofollow plugin) has not his job. I had numerous problem by the past with this plugin like 500 errors...
On the other hand, your plugin works well and does not slow down the website.
I required a reliable plugin that could put a nofollow quickly on every external links ( i guess i have hundreds of them).
I am used to google penalty due to external links and i know my website will recover thanks to your website.
Good job !