This would be a useful plugin--I mean, who doesn't want their website to load faster? I downloaded and installed it, and was appalled at the giant Advertisement for the author and his services in the Admin area (about 2x the fold of the screen).
#1. Buy Premium Plugin--you get so much more!
#2. Donate to the project
#3. Hire me to develop your site
I typically donate to plugins that are making me money, adding value to my clients, and saving me time--it is simply good karma and an investment in my business future. But, there is no way I could leave a client with 1200 pixels of advertisements in their admin area. It simply looks shoddy and unprofessional.
That being said, the plugin wasn't installed long enough to test the functionality. I'll have to find another plugin or write my own.