I just tried Google Hangouts today with my friends and all i can say is i'm impressed with it's performance. I tried to have a conference video chat with two other people and the quality of the conversation is superb. All i need is to download Google Talk Plugins and connect a mic and a camera (opsional) and that's it. I can launch Google Hangouts and invite some people to connect with.
Even though Google+ is not too successful in terms of number of users compared to Facebook, but i guess Google Hangouts is another success story of Google for providing an easy way for their users to have a better means of communications meadia over the Internet.
I will try to use Google Hangouts more in the future