For the most part Siteimprove works well and easy to use and well organized UI.

This tool has a future. Siteimprove thinks what a customer need. We had an old IBM Policy Tester and replaced with this tool. This tool does way more than old tool. Digital Certainty Index, Broken links, misspellings, policies, SEO, Accessibility (missing header, alt tag)... OMG !! way more features. Best part I like, this tool tells you website's Readability like a student of what grade can read your site. How cool is that !! Customer support is great. Immediate response. Business partner is great. Frequently touch-base and seek improvements. Recently added GDPR module and exploring more.

We initially got this tool to handle misspellings and broken link checking for a large portfolio of websites. It is impossible to monitor this manually. They have since expanded into accesanility checking as well as ADA compliance and a more robust toolset.