I like that it's easy to use, you can get up and running quickly without needing much knowledge about rails or ruby in general. There are some features i dislike (like not having an API) but they're minor things. If you want something simple i would recommend giving this one a try! You don't need extensive experience with both ruby/rails and vulnerabilities research to be able to learn how to do basic scans and get results in no time. We were looking for a solution where we could just plug in our app files and have something scan them for common vulnerabilities using open source tools.