NLP is really awesome and everyone that does down talk it knows little or nothing about it. It has many uses other than just pick-up.
Saying it's good or bad is just how you use it, then again good and evil is only a point of view.
I think SSers from a women's point of view would be some mysterious man that is some how able to make them feel ultimately amazing, through his wise words and abstract little games.(games as in like the visual guiding in the october man and other sequences).
When you're attracted to someone, do you know why?(you probably don't) and then again if you're like every other human you'll not even ask yourself that. Same thing with women, they feel extremely attracted to the SS, but they don't care to question why.
But I think combining all PU stradegies is more effective than using just one. Which I think just about everyone is doing. Everyone has it's strong and weak points. SS is strong in comfort, and especially the seduction stages of course!