I started using this plugin a few months ago and it worked for the most part. It helped with SEO rank(page speed) and other things like making the site faster.
With that being said it has caused more problems than good. I have had my sites get the white screen of death over and over again. I have done the usual disable everything and find whats causing it and nothing comes up except the caching plugin itself.
Some people have good results with it, but I personally had not good luck. I would not recommend this to a friend.