I have been using Google+ for a few months and find it good to use. It has got it's benefits just like any other social network and can have the potential to be a leading social network. There are also SEO benefits towards posting your articles/pages on the network however that will probably change when it's abused, and i'm not sure if everything posted gives you a dofollow for your links as Hobbit mentioned earlier in this post, but putting your site in the profile section has a small benefit, and webmaster tools also acknowledges links from the network.