I had quite a complex membership system that needed to be implemented and selected this component to work with. Initially, it didn't meet our requirements exactly and the developers took the suggestions we made regarding the component and implemnted them immediately. Not only did they improve the extension, but they met the complex issues we faced with multi level memberships.
Superlative would not be an adequate adjective when trying to describe the support that was provided. Responses were extremely fast and I also know from watching the clock that many of them were sent in the early hours of the morning.
This extension is now working brilliantly on our site and I cannot recommend it and its developers highly enough.