The visual interface is easy & clear for any newbie like me as well as seasoned tester who have been using it for some time now.
I can easily navigate through different modules/tools without having to spend too much time finding what i need. It's not so intuitive sometimes (eg - when you're used to other tools) or maybe its my lack of knowledge about this tool but there are times where i've had difficulty figuring out how to do something simple. But overall, it has helped us greatly by reducing our manual QA effort.