This software is a descendant of the former "gnome-meeting" software. It comes bundled with its own SIP service but claims to work with others. Unfortunately it has inherited not only the GUI from gnome-meeting but also the habit to crash every other minute without apparent reason. So I never got to really test it yet.

The developers might be better off not making the same mistake as they did with gnome-meeting and should try to fix all the bugs instead of adding more crashing bells and whistles.