Hey I signed up to Slimming World last week. Can't help with how much weight can be lost as yet as I have only had initial weigh in. I don't find it that hard. Easier than Weight Watchers as no point counting and not weighing everything that goes into my mouth lol. As there are so many free foods, which you can eat as much as you want of, there is absolutely no need to be going hungry which can only be a good thing.
If you decide to go that way good luck and feel free to contact me anytime. xx