I have used this plugin for years, but recently it has been causing me problems. I can no longer find a way to get it to integrate nicely with Advanced Custom Fields, which is another "must have" plugin as far as I am concerned. At the moment I am finding that any content I add with ACF is ignored by Yoast, and on some sites that is actually most of the content. This means the "SEO scores" the plugin provides become extremely inaccurate and misleading to non technical clients.
If it wasn't for that, I would still give it five stars.