The RSMembership! is used for subscription of the beta customers of the software offered on my web site. The extension allows you to create a custom subscription form handling beta license agreement. Confirmation emails, period of the membership, members-only access to the software download area is fully controlled by the extension. It is rich in features and yet very intuitive and user-friendly.
I use the extension in combination with "Art of User". The latter allows you to create custom user types; and RSMembership! allows you to change the user type both when members subscribe and when their membership expires. For example, there is a build-in type "Registered". With "Art of User" I created a type called "Beta Customer". When a user subscribes, RSMembership! sets their type to "Beta Customer". When the user's membership expires, RSMembership! automatically changes their type to "Registered".
The best part of all RSJoomla extensions is the customer support. Perhaps I am repeating here what other reviewers have already said. Yet this quality of support is incredible! I have never seen such attention to and understanding of the customer's needs. They respond immediately. When I file a ticket, I know, that the next morning (I am in the USA) there will be a response in the mailbox. Quite often the response is that they just implemented the needed functionality, and all I have to do is download a new version of the extension.
My personal thanks to Andrei Cristea, who has always been extremly helpful, prompt and courteous. He literally walked me through a number of the extension customizations needed for my site.