I have only just stopped using TF.. was on it for about 6 weeks and lost 8kgs. It's good, but definately so restrictive. I still have a bit of weight to lose but just couldn't stay on the TF any longer as all the water and the shakes just ended up giving me the runs and I needed to have some good "solid "meals instead of salad and a little bit of protein.
I did feel a little misled though, cause when I joined, even though the lady knew I had a fair bit of weight to lose she told me I would be on the shakes for about 3 or 4 weeks. Each week I would go and weigh in and expect to move onto a next step but it just didn't happen, she kept telling me to stay on the TF for as long as I can.
In all, I feel as though it has given me a great kickstart in my weightloss and I now appreciate any little bit of food I can put in my mouth so sticking to a balanced diet is kind of a treat IYKWIM.
Good luck with the weightloss.