This plugins load the CSS file on all the pages on the blog.
It should be updated to load the css only if the user wants that page to have a review form. This is increasing payload when it should not.
If this is true, that is indeed an issue that should be fixed. I am not a big fan of plugins that add bloat globally to a website's page loads..
One would think there would be a php if-then check implemented from day one to determine if the page/post is configured to accept reviews. A confirmation by the developer that this issue is either in the works, or the above posters are mistaken would go a long ways towards liking this plug-in.