I've got very few sns products, but the ones i do have are "dip in powders" i do not use them as a dip in, I use them as a regular liquid, powder and brush acrylic application and they work lovely for this method.
I'd like to add that most dip, pour or whatever powders can be used as regular acrylic powder, and i don't think pour or dip is very practical. The only time I do a pour on is if someone just wants a little added strength to their natural nails, which is like a wrap basically, only acrylic powder is used instead of fiberglass, silk, etc.
So i can't say whether its a good investment, i can say its not really better or worse than any other acrylic I've used. Sorry if not much help.