I have purchased and use the aplication.
The interface is very user friendly. Most, if not all of the options are labeled with what they do and how they operate.
I am not an seo expert but my registrations increased and number of visitors increased when I started using this application on my site.
I am pleased with the application and plan to continue using it both for the reasons you posted above and for the low cost involvled.
Overall a nice product and the author has responded to me in a timly fashion and has been active both here as well as on his own site.