I like how it opens the bookmarking page in a separate window since some other plugins transfer you within the same window drawing your audience away from your site. The choice of different sized icons and presentation styles is nice. This plugin also works across the English and Chinese versions of my site without a hitch.
I'm giving it only four stars because you're limited to just the seven main bookmarks that it comes with out of the box and you can't configure those, but as a way to get social bookmarks up on your site easily and quickly, this is a nice plugin.
Just for everyone's info, he said he made a change in version 2.11a so the zoomlevel is following Google's setting convention instead. You have to do 19-old zoomlevel = new zoomlevel.
Overall, a great plugin!