The maintainers forum might be the place to ask, and get tips - but obviously, they're a self-selecting group.
Depending on which statistic you use, between 80-95% of people are 'unsuccessful' dieters (on all diets). (The definition used for the more modern 80% statistic is that the person lost at least 10% of their body weight and kept it off for at least one year). So - one in five last a year. There are no stats I can find for studies that look at regain past that period. In fact, there are surprisingly few stats at all.
What I did find was a study that said ultimately, you're no more or less likely to regain weight if you're on a VLCD, although VLCD dieters do tend to regain more, faster - conventional dieters regain more slowly.
The point is that im not a statistic, and nor are you. We are individuals with free will and a psychological makeup and intellect and social life and home life and occupation and history and biology. And all of those variables, some of which you can influence or control, will decided whether this works for you.
fwiw, I intend to see a therapist once i've finished this diet, to help address my psychological barriers to eating normally. I think getting to goal really is just the beginning.
edit - all my facts and figures came from
here. Worth a read.