I just encountered Zoom this week! I had a conference with a German (I'm in Vietnam at the moment) and she sent me a link to it. I'd never heard of it and was a bit frustrated to need to install another plugin.

But it was a great experience compared to Hangouts! The connection quality was on par with Skype and it was super light-weight for something based in the browser.

8.5/10, would use again.