We've been using Moz since Jan 2014, when we switched from a desktop application that provided rankings reports, etc. Since then, Moz has been a key player in our SEO service, responsible not only for rankings data, but also keyword research, competitive analysis and tracking, on-page grading (great for when Yoast isn't an option), and more. It's one of our most expensive software subscriptions, but well worth the cost.
