If this device were to work, the world would be turned upside down. Cheap limitless electricity would completely wipe out the oil, gas, & coal industry, and the bulk of the US military would have no purpose. It would also put an end to man-made global warming.
I'd like to buy one too, but... This device violates the laws of physics - and those laws tend to be very pesky. The history of such inventions is not good, but I try to keep an open mind - I really hope they've found something beyond our fundamental understanding of physics.