[Note that the Lightscoop does not replace fully-featured and more powerful tilting external flashes for advanced or professional photographers who need them. That's a whole other class of equipment.]
The Lightscoop is superior to gadgets called diffusers because putting a diffuser in front of a pop-up flash does NOT change the unnatural direction of the light. Do you know of natural light sources that come aligned with your forehead? Ah, yes, headband lamps, miners' lamps, and dentists' spotlights.