I've tried them. I did lose some weight. But I was EXHAUSTED and tired and grumpy the whole time. At one stage (roughly 3 weeks into the plan) I cried and begged DP for one slice of dry bread! I just wanted anything I could actually chew. I was utterly useless and couldn't concentrate on anything. Once I had stopped, I put all the weight back on (and more!), although I was eating healthily then. My body just went into shock and stored anything I ate straight away as fat.

So, I think they are pure torture and useless. I am now just focussing on eating healthily and exercising and have so far lost 18+ kilos. It can be done. But doing it slowly (as much as that sucks, I'm super impatient) is the right way to do it.

Good Luck!