I've bounced around using several popular Wordpress SEO plugins, but some of them are a bit time-intensive to use regularly.
My workflow is just way easier using Squirrly. It gives me actionable steps to take, and I feel like I'm actually making SEO progress instead of just filling in boxes and hoping for the best.
Also, I'm getting regular communications from the company, so it feels like they're active. I'm very happy so far.