I gave it 2 stars for ignoring the Google +1. Its trivial to implement. No worse than the GA code - just plug in the right ID into the script and off you go. So code isn't a problem. The graphic is freely available so that's not issue. That only leaves the developer.... hence my 2 star rating. I don't want a plug in on my blog that isn't going to be maintained by the developer.
http://wordpress.org/extend/plugins/trackable-social-share-icons/