I purchase this only because I thought my site was protected with all the FREE security protection and making some changes that's recommended by Joomla. It wasn't until I tried to backup my site and restore it is when I had someone point out that my define.php file was hacked. After finding out about RSJOOMLA I watched the youtube videos and I was sold. it showed me how unprotected the site really was. It gave recommendations on what to change, If you don't know how it points you to there help file on the exact thing you need to do. I had 1 particular problem and the Tech support helped me from start to finish. What I also like is the fact that you can block uses from the backend, lockdown your com_install and you can have the software scan your files like your define.php for any changes, it will then email you when something has been changed.
I've bought several components, but this is my FIRST time feeling that they deserve to have me write something about them. I will also have my other site clients purchase this for their sites also.