Not me but a close mate has been using this successfully for about 3 months. She wants to lose 1 1/2 stone though she's unusual in that she's 5' tall and has very long legs! I think she started at 10 stone?
She likes the 'syns' idea (I think that's how they spell it), and another mate noted that she was able to eat a lot of allowed food as we sit together at lunch time.
She abandoned the group meetings early on due to time constraints (and, if I'm honest, she was a bit
about the odd element of hokey weight-loss 'science' the leader was peddling -she's a HCP and knows what's what) so now does it online. I don't know what her loss is now but she'd lost 8lbs in 7 weeks when we last compared statistics.
Personally, and here I can speak for myself, I am never entirely sure about The Group Thing. I think it's very dependent on whether you care if a bunch of strangers cheer weight loss or commiserate that week's 'failure'. I attended, in support of a very much larger friend (though I could have lost half a stone myself), a WW group in London 25 years ago. I am going to be a complete snob here (sorry!) and say that I could not identify with these vast, not-very-well educated women who, in no time, had formed a coven of solace about how 'bad' they'd been this past week, titter, titter, what-are-we-LIKE?! They sought and got comfort in the fact they were all as crap as each other at sticking to a diet. There was the merest smattering of applause if someone actually showed a loss! But I only speak of a specific group a long time ago. Yours may well be different and full of genuinely supportive people all set on serious weight loss.
Anyway, in SW, the food that they recommend seems entirely reasonable although, to me, oddly, they allow loads of pasta but very limited bread? However, I guess they've done the science and know! It's working for my friend!