Like Andrea said yep!
Flex gives you a daily points target (mine is 26), and 35 flex points to use how you like them (I save mine for eating out on weekends). You have to count everything you eat with flex...just like calorie counting. Core gives you the list of stuff you eat from as well as the 35 points...so you can still eat out. But with core often I found I was using my flex points on stuff like 1 Tbs of margarine.
You can eat out on both core and flex. The key is like you said moderation! Many restuarnts have nutrional information on thier websites so if you know where you are going you can plan ahead. Planning ahead is a BIG help for me.
You can earn activity points. AP's are calculated on your weight, the duration of exercise and the intensity. At a moderate intensity I earn 1 point every 15 minutes for my weight. Ap's have to be used the day they are earned I think. WW recommends that you earn an average of 4 a day. But they don't want you to earn them just to eat more, they are there b/c your body needs the extra fuel when you workout.
I hope this helps
