Big impact

I can’t disagree with all the other 5-star ratings. Unless a lot of cacheing plugins this does seem to make a huge difference to page load times. It has to be supported on the server-side as well as the client side so perhaps this is why. You do need to be a bit careful with some of the settings like css which caused a little havoc for me until I turned off the option to merge css styles. Image compression is not working well for me either. But generally speaking the overall impact on my site has been fantastic