G+ is fair to middlin' at a bunch of stuff. Comments lack threading. There's poor noise control. Content filtering is limited to "+1" or "flag". There's no "-1" button (though various Chrome extensions have offered this at various points.
The main advantage is that it's a large community (10m+ users presently) initially seeded by Googlers (e.g.: tech-savvy people), and including a few notable luminaries such as Rob Pike. And if you've got the right circles, eventually good content finds its way into your stream. Sometimes (content discover/surfacing is something G+ does surprisingly poorly, and is an area at whch HN, Reddit, and StackExchange win hugely).
The main advantage is that it's a large community (10m+ users presently) initially seeded by Googlers (e.g.: tech-savvy people), and including a few notable luminaries such as Rob Pike. And if you've got the right circles, eventually good content finds its way into your stream. Sometimes (content discover/surfacing is something G+ does surprisingly poorly, and is an area at whch HN, Reddit, and StackExchange win hugely).