That’s a tricky question ??
Personally, I don’t think there are “good” or “bad” plugins – it always depends on what the blog owner wants to do with his/her blog. Generally, plugins add different features to the default behaviour… some people use 40-50 plugins, I am a minimalist, so usually I have 5-6-7.
Since the social networking is such a rage in the blogoshere – this plugin comes handy to give your visitors a chance to ‘bookmark’ your posts to different such sites or email a post. Other than that doesn’t it doesn’t do anything.
