Easy install, easy use. Works across all content pages and only clashes with a few other content plugins (causing display mash-ups). However, disable other plugins and this still chugs away and i'm sure the issues could be resolved if i tried :P

Very easy to install, very simple to set up to use with your content and other componants such as Seyret.

The themes/skins took a bit of customisation, and it requires 1.5 Legacy mode, but it's a very good comment feature which works well and beats all the competition as far as i'm concerned.

+'ves: Free, Easy to install, Easy to customise, Good support
-'ves: 1.5 legacy mode needed