In a nutshell: works!
And it comes with excellent support. We purchased the premium version (which we think is a square deal for the effort behind it) for our BuddyPress non-profit community site, and ran into some minor issues in turning from the free to the pro version.
Replay came very quickly after sending a help request, and it was easily solved by the maker of the plugin, plus some extra tweaks for us.
Summary: great plugin, both code and support could not be better.
And no, we are not in any way affiliated, just happy customers :-)