To add to the above:
All starters and desserts must be superfree.
You can have up to 15 syns.
You can have 3 SE meals a day, if one of your meals consists of A/B choices and superfree foods (eg eggs on toast/cereal) then you can still have another SE meal if you choose so you could in theory have 4 meals a day.
All syn values must be taken at the highest red or green value (opposite to SE)
SE is used to give your losses a boost but apparently will not feature in the books in the new year.