I tried the plan a few months ago and I went through really bad detox, I atually had to take time off work.
I had to stop because my job was more important to me.
I recently started having the shakes again, but only as a meal replacement here and there. I'm not actually following the TF plan.
I had the shakes and thought I had better use them up.
I believe a lifestyle change is better than something like this because you can't live like that forever.