Excellent plug-in for Atahualpa

As someone reliant on plug-ins for most of my site features, this plug-in is a big winner to address a gap in the Atahualpa theme (or is it a www.remarpro.com thing?) related to follow-up comment subscriptions. Usable immediately upon activation; easy to customize features and plug-in-related messaging; seemingly no side effects after three days of use and various testing. Thank you, developers!