I know exactly how you are feeling. I have moments of toying with SW but I've never had good results on it. My portion sizes and carb feasts at every meal go out of control and I've always struggled to see how 100 calories of mullerlight is 'free' food.
On the same token, put me on calorie counting and I will eat and drink 1,400 calories of chocolate, crisps, takeaways and wine.. no healthy food in sight!
That's what's led me to create my own rules (though I acknowledge I've failed them this weekend but I'm ready to go for tomorrow).
You'll find what works best for you
xx