I lost 2-4lbs a week at first on SW. I followed most of their rules apart from unlimited potatoes, pasta and rice, I limited. I made a few other changes:
Lurpak lightest
Less coffee
Used sweetener
I swear by green tea (I have it with a slice of lemon and 1 sweetener)
I had salad every second day
I reduced red meat to once/twice a week
I had 3 meals a day
Ate dinner earlier (5-6 rather than anywhere from 7-9)
I turned to calorie counting and at some point I hit a plateau so I upped my red meat and started losing again.
I've hit plateau again

and atm not sure what to do, I stopped eating breakfast again so today I started with a small portion of bran flakes... I was sometimes skipping lunch again unless I went to the gym when I would have chilli scrambled eggs when I got back but I am back on the protein shakes today for lunch/after the gym
Hope that helps? x