Well, considering it still in testing, it's not going to be as flashy as it might end up being. But what it has over facebook that I think is really awesome is seamless integration with all your other google functions including email, photos, calendars, and so on. Also the way it allows you to organize friends and whatnot is incredible. If it catches on, I very well may use it. Either way, I don't use facebook so there would be no transition to me. Here is some irony for you:
https://plus.google.com/104560124403688998123/about