I tried TF in a desperate bid to lose weight.
Unfortunately, the diet is not only very difficult to follow, but quite unhealthy.
The way it works, is to trick your body into believing it's starving - thus "eating" the fat your body already has. To do this, you have to live on practically no carbs, and VERY low calories... how can that be healthy?
You have to avoid breads, potato, corn, pasta, biscuits, cakes, chocolate (most things with sugar or wheat pretty much), then you also have to avoid cheese, milk yoghurt, etc etc.
So what DO you eat? Pretty much nothing.
Either artificially sweetened low-carb products (which, if you eat more than a tiny amount, give you extremely bad wind pain), 2 pieces of "allowed" fruit (some fruits are out), 2.5 cups of "allowed" veges, and a palm-sized piece of lean meat.
Oh - and the disgusting shakes. They say to water them down by 200mL - but gross. I made it 300mL to make it bearable... but even then it wasn't exactly appetising.
The fact that you can hardly eat anything, coupled with the fact that the weight will come back on if you don't stick to their "maintenance" diet after you've lost your desired about of weight... well, it's really just an unhealthy waste of time and money.
Oh - and if you screw up and eat a piece of chocolate or something? Well - you're stuffed for about 2-3 days before your body starts to believe it's starving again... and if your body believes it's starving (which, with this diet, it is, mildly) but then recieves the tiniest amount of food, it will take AS MUCH FAT from that food as it can, because it's not sure how long it will be before it gets some food again.
Don't bother with this one.