To not be a ******* this time and give you some real info....
What does a supercharger do? In a nutshell...Forces air into your engine. A moderate boost blower will almost triple the airflow, larger blower, even more. With that much more air, new injectors are almost always required otherwise you'd just be running your engine extremely lean. In addition to that, a new fuel map is needed to get a proper air:fuel mix throughout the engine's range.
What is a supercharger? Essentially it's a pump, driven by a motor. So...what size the motor is dictates how much air it can move. Lets use a current 5.7 Hemi just for arguments sake. At its peak, it is producing 390 flywheel horsepower. Pretty strong drive for an air pump, right?
Ok, what is the motor driving this electric fan? About a 1/8 HP constant speed DC electric motor
Note I said it is a fan, not an air pump, significantly less efficient....either way...quick math...with the Hemi as the drive motor, it's 3,120 times more powerful than the electric fan.
So, these guys are advertising an 80 HP gain. Lets think about this...Currently RIPP Superchargers offers a full supercharger system (as I described above) and you end up with about a 130 HP gain at the wheels. So does it make sense that a 1/8 HP electric fan can get you about 60% of the gain you'll see with a real blower system?
Hope that was a bit more helpful than my last post.