I've been using Discord with the Halo Community for the last few months, organising EU Customs weekly so that the lower tier players can get more involved and ask questions about the events etc.
Discord's UI is awesome and I've heard fantastic things about the mobile version of the app. It's basically a better version of TS3/Mumble/Skype combined. Communication is key with this program, especially the way you can just send a link or join a party without having to add an IP, port and password + installing the software itself. It also has rich text chat which means you can directly post gifs, videos, gachimuchis and anything else in particular.
Our TS has disconnected a few times in the past on rare occasions, but Discord has failover (switches server's if the current one fails).
I'm all for it, I also like men.