Well, for me, paying the $45 odd dollars a weeks is well worth it because I know it works. I've lost 15.2kg so far and have not really done much exercise (maybe 4 or 5 walks for about 40 mins, that's all). I have tried weight watchers and the CSIRO diet as well as the liver cleansing diet and they were not right for me. I like the TF diet because I don't have to worry about what to have for breaky and lunch (just a shake or soup from them), and dinner si really easy without too much weighing or measuring stuff, so it suits me perfectly. My mum has just started it too (3 weeks ago and has lost 6.3kg in 19 days - she doesn't exercise either and has also had no success on other diets such as ultra lite, weight watchers and some others that I can't recall). My grandmother also started 2 weeks ago along woth my aunty and they're both having great success too. My grandmother has a thyroid/metabolism problem and puts on weight when she's tried other diets, even ones given to her by doctors for patients needing to lose wieght before surgery.
This probably doesn't help much, but someone else may be able to share their thoughts on it too.