It's a pretty simple setup. You just create a room, and set up different channels. Some can be message only, some can be message and voice, and some can be just voice. It's very easy to just jump in, read through the messages and jump out with out having to join a voice channel. Not to mention there is built in mute, deafen (which mutes you and everyone else), and volume settings. I've only used the web based one, but there is a client based one as well, with all the same features. Also even if I create it via the web, even client based people can use it, and there is also a very well built app for iPhone, not sure about android but I assume so, that works just as well.
Certainly sounds convenient. Knowing when there should be action and knowing when I should be doing something more productive would be nice.