Google+ Hangout's!

I was just checking my mail, and up popped a little advert for Google+ Hangout's! It seems awesome! It's kind of a bit like Skype Premium with added extra's. You can video call with up to nine people, but not only that, you can also watch YouTube video's together and 'more!' On this 'app' you also have webcam effect's built into the app, screen share and view Google documents together. I don't know what the stability of the app is like, but I can't wait to try it out!