The concept is great, the execution, not so much.
This plugin made my author site crawl. I'm talking about 10 minutes or more initial load time. Even in a browser that had visited the site before. Mobile devices timed out trying to load it.
Once a page was loaded, it would be slightly faster to load a second time, but I was still looking at 5-7 minutes or so instead of seconds.
Slow load times bogged my server down so much, I was told I'd need to upgrade to the package just behind a dedicated server, at an extra 49.95 a month. A year of that would have been 3 months or more of income.
Luckily it turned out to be a bad plugin; much cheaper to fix: Deactivate, delete.
DO NOT USE.