Hi,
I've installed the plugin and it has a Google page speed score of 72.
The site is trekity.com
It uses MAxcdn as a CDN, uses APC and has its own server.
I've followed these instructions: http://www.wpbeginner.com/plugins/how-to-install-and-setup-w3-total-cache-for-beginners/
But it still seems slow.
Any ideas?