How does it compare to free version?

Benefits compared with free version.

1: No or very limited support.
2: No easy update process, in the Penetrator you can just press 1 button to update firmware no reboot even required.
3: Constant new features coming to the Penetrator. It is now 44.1.9 and soon coming v46.

In the free version it can be very limited when new features are coming since there is no paid incentive.
4: New feature request from customer requests being implemented in the Penetrator.
5: You do not know with the free version if it collect data or live up to regulations such as GDPR maybe free tool collect info for people behind it that use it.