Perfect in everything.

This plugin is one of the must-have.
It is the best self-hosted (and not!) plugin for WP comments;
Developers are free to listen you and update the plugin according to your features requests (if it’s, obviously, possible and necessary at the moment), fix bugs that could be just even for you and help you with everything.
The plugin integrates perfectly with WP style of every theme and its functions are so much, which thing let you do anything that you want with your comments. Really so much customizable and ready to satisfy you for any purpose.

Great.