If you have previously recommended this thread, you should see a tick / check mark on the recommend button. Click the tick to undo the recommendation (the tick may appear to change to a cross as you do this.) If you added a comment with your recommendation, you will need to delete that from your facebook wall separately.
Hiya, I think both work if you can stick to them. Simply for ease of use online I would say WW, SW's programme although good is really hard to follow online. Both have extra allowances for breastfeeding. Last time I joined WW online there was £30 cash back on quidco so it only worked out at less than £5 for 3 months. Good luck!