How to find out more about WPMU Dev CDN?


I'm exploring the option of using the WPMU Dev CDN but am having a hard time finding more information about the CDN, how it will decrease server load and increase page load speed, etc. I am also interested to understand how the CDN performs in different regions as some of my websites are "global", some are quite regional and I need to take this into consideration.

Thank you very much in advance for your time and help.