I needed a solution for multiple sites running for one organization, with some unique backend login and sharing needs. I found the basic installation and setup of the extension to be quite straightforward and troublefree, by following the tutorials on the JMS2Win site, and I'm not a Joomla pro. But, because of my sites' unique login and sharing requirements, I needed some extra assistance from the developer. Edwin was wonderful to work with, coming up with a superb solution to exactly meet my needs. Highly recommended.