Rated 4 out of 5 stars
This is exactly what we need in order to fight user agent-based tracking by Google, Facebook and all the other Big Brother companies. I second the suggestion of expanding it to include more parameters (such as Time Zone, Browser Plugin Details, etc.) as detailed in the Panopticlick project by the EFF. However, apart from the option to have it automatically change the user agent at browser startup, I don't think that operating it should be made any more complex. Right now it just does what it promised to do, with very little input needed from the user. This is great for the many uninformed users who are easily intimidated by too many options and features.