I saw the Hangout in my sub feed, but I was busy at the time to even just take a peek at it. :/
Well Google is nice and all, but a lot of people has genuine cause for concern with what they do recently. Hard to for me to list them here though, but when pressed real hard, I could make the effort. And by "pressed real hard" I mean harassed. But I'll say this though: people are awfully pissed off with the G+ hullabaloo on Youtube.
Believe me, I have no real great love for Google's efforts to force march everyone into Google+ or the myriad other ways they want to erode user privacy. The Google+ fiasco is especially bad since 1) it was communicated to users in an absurdly unclear way that led a nasty taste of 'bait and switch' in your mouth 2) it never made a case for itself beyond being an excuse for Google to aggregate more of your personal data across websites.
I do use and enjoy a lot of Google services but some of what they do now puts me off, say, getting an Android phone.
All that said hangouts is a pretty cool system. And therein lies the rub.