This extension has many options you can show or hide, so you can make it the way you want.
What we like most, is this extension is a module, so you can add or hide it to any page you like and it's possible to add different messages to different pages.
It was easy to setup, it took only 8 min. (including signup with maxCDN, creating pullzones and plugin-installation and setup)
And my Pagespeed (According to Google) took a jump from 43, before installation, to 80, after it.
I'm happy to use CDN with this plugin.