[tyfon]

I just tested the video call with my parents that still have an old adsl link to their home, it was crystal clear. Both skype and hangouts struggle when doing the same. Hangouts actually makes the audio choppy.

I'm a bit worried about using something that is free and has no ads while maintaining central servers though..

[degenerate]

I just gave it a shot too, and it works well. I deleted my account though, because I only need voice chat with my team and Discord has this app beat hands down for collaboration and team rooms.

[tmikaeld]

Discord isn't encrypted (Only client-to-server) and it's not open source at all.

It's too bad though - as you say - it is very nice for collaboration and teams (It's geared exclusively towards gamers).