This air pump does, indeed, work as advertised. I was actually very surprised when I took it out of the box and felt how relatively heavy it was for its size. This product is not make entire out of cheap plastic so it feels study in your hand. I was able to top off 6 tires, on our two vehicles, and because it has the digital pressures gauge, I was able to let air out of 1 over inflated tire, down to precisely 35 psi. The button on the pump that allows you to deflate while the air hose is attache...