A simple change of DNS is all that’s required to use CloudFlare as a CDN and file optimizer. So far, the service has proven to be an excellent choice for a free CDN and file optimizer.
The service seriously changes the speed of the sites I’ve configured. I did have some intermittent slow time while DNS was propagating, but I expected it. The security/threat setup is also really neat, especially if your site sees many spam users or bots.
While it might tak some getting used to, especially with regards to toggling development mode, it’s going to be hard to beat on the speed and reliability front.