Well, it does exactly as advertised. Fits in your pocket easily, and goes bang. There is Zero accuracy with it, shooting it more than 2 twice is barely an option. It's designed as a last resort BUG, for pointblank shooting.
The one in the video is a .45. As you can see it HURTS to shoot, an only has 2 rounds. My brother thinks it's cool, I think it's worthless.