This extension is comes with many features needed in customizing and controlling user registration. A huge plus is it writes directly to the Joomla user tables, so no need to constantly make sure your users are in sync with the component. You can create custom fields and add them to the registration process, and send multiple emails for each step of the registration process. Another plus is the ability to assign email addresses to the registration process, so if you have distribution lists this comes in really handy. If a full community extension like CB or JomSocial is overkill for your site, but you need a more complete and customizable registration solution with statistics, extra fields, and statistics, definitely get this extension. Very easy to use and install, even for beginners.