Short review: It doesn't work at all.
I had the forums running for maybe a couple weeks, and then they suddenly just stopped displaying on the page. The developers are either defunct or just don't care, as the plugin's website (tal.ki) is constantly offline. There is a free and paid version, and considering the quality of service, I wouldn't recommend even wasting your time with the free version.
That the developers would honestly expect someone to shell out $9.99/month for this is laughable.