This plugin cleans up a number of issues, doing the work of multiple plugins, improving speed, efficiency, security, SEO, and user experience.
Several of these features work together to improve page loading speed and will improve your Google PageSpeed score and Yahoo YSlow score. Do a before & after test with GTMetrix to see what I mean.
As with any JS/CSS minification & caching plugin, it's important to test, test, test. Because of the type of plugin it is, this plugin may not work for every site out there, but that does not mean the plugin is broken. If you have any issues, please submit a support request so we can look into it and make it as compatible as possible for everyone.
For a more thorough explanation of what the plugin does and why you need it, as well as how to get the best performance results with it, visit the RS Head Cleaner Plus plugin homepage.