i listened to a whole late night informercial on one a few months ago. they compared two 2-liter bottles of soda taped together end to end, making a watery tornado to their product. it was a good story, it just doesn't make any sense if you are half way into cars.
there is a legitimate guy making an electric supercharger utilizing eatons that will act like a nitrous
burst. he has a lot of people to convince!