This is the best comment extension I've tried. It's very easy to install, has lots of features and it looks nice. It has some nice modules, and it integrates nicely with Community Builder and others. You can import comments from almost any other comment component.
The backend is well organized and has many options, although an "IP blacklist" list is missing (maybe its coming soon?).
Anyway, this is an awesome componente. Thanks so much for sharing!