The best feature is that it allows you to use Java in your webpages without any additional software or plugins like Selenium, TestNG etc. It's easy to integrate into my Java project and I can test my webpage very easily. Its not free though! There are some limitations such as number of concurrent users for each session. Also its not good at handling large data sets. If this solves your problem then go ahead otherwise there must be other alternatives out there. We were solving our problems related to testing by integrating it with our backend development team so we could perform automated tests while developing new features. This helped us greatly in delivering quality products faster than before.