This plugin has a HTML validation error in that it uses single quotes instead of double quotes on the style attribute of the div tag.
Also, it places the script into the body area instead of the head.
Another concern is that the script file is added in such a way that it ignores the fact that other plugins may have already added this script.
I'm using another plugin that adds in the head:
Then this plugin adds in the body:
Thus the page load times are increased needlessly.