I joined slimming world 5 years ago to shift baby weight. I lost 2 stone really easily, it really did just fall off, and I felt great.
Over a year or so all the weight crept back on, and getting back "on plan" repeatedly just didn't work. I rejoined more times than I can count and the plan just didn't work. I'd be losing half a pound every couple of weeks despite being 100% "on plan". It was demoralising and I gave up and got even bigger. I don't know anyone who has kept weight off with SW (and I met a lot of people through my many many joining attempts lol)
8 months ago I joined WW online. It's a much slower loss than SW but it works. I use the app, I track everything I eat. Over the summer I have gained about half a stone, and now I am back on the app to shift it again.
I am hopeful it will work, but reading up about diet clubs etc the general consensus is that they simply don't work long term. (I have a friend who lost 6 stone on WW and has kept it off for 10 years so she is my inspiration!)
I've seen MFP recommended a lot and I downloaded the app, but I'm not sure it is that different to WW except on MFP they recommend you count everything so I'm more likely to eat a packet of wotsits than a banana
fruit on WW isn't counted so I eat loads and loads of fruit and veg when on plan.
Is the general thought that all "diets" are doomed to failure? I'm not sure I understand the science behind it but it does seem that SW in particular only really works once!
I'm still gonna soldier on with my WW app, I don't weigh weekly so I will see in about 6 weeks whether I feel any slimmer...