Has anyone ever tried the Detox Diet?

My girlfriend has read a lot about the Detox Diet and how it is suppose to rid your body of impurities or whatever the case may be. Since she is trying it, I thought I would as well. Has anyone out there tried it? What have the results been? Do you find the diet to be beneficiary to your health and how you feel after wards? Any general opinions of the experience would be nice.