One other HUGE selling point: I have NEVER seen better response times or helpful answers on the part of a developer (and Bob) in a forum! It makes the component even more useful. Definitely worth getting the optional license if only as a way of thanking them.
The admin area will be getting some more powerful data manipulation controls soon, and I'm very excited about those.
I hope the ability to change user accounts' Enabled/Disabled settings via CSV will be added, but really have no complaints whatsoever. Kudos to the developer!