I had my doubts whether the device really works, but they were not entitled. My satellite dish sits on the roof of an outbuilding. From here the signals via a multi-switch and 40 meter cables are sent to the Stacker and again here about 25 meters to Destacker and the receivers. I have nothing to complain about on the image quality, even in HD no. The installation is very easy, though the supplied cable material is very stiff. The investment was definitely worth it, if I would dennke mind how great was the cost of a second line.