The ability to use this software as a base for other tools, such as Metasploit, really allows you to create your own custom toolkit. I like that it can be used from within a VM, allowing you to easily run multiple tests in parallel without having to go through the hassle of setting up a physical lab. It's great if you have no previous experience with pen testing. The installation process can be confusing at first, but once you get the hang of it you'll be fine. Once again there are some limitations with the free version, such as not being able to use several modules. This is a great tool for anyone who wants to learn how to do pen testing. I have been able to create my own custom scripts for different applications.