TV connected to cable - image is sharp (additional option when HD cable provider booked), the sound is also nothing to complain about it. The device has, unfortunately, no ON / OFF switch, unfortunately I pulled over the holidays the plug. Result: all transmitters were gone. The programming is a nightmare (as others customers described). With 40 transmitters should be stored in advance before submitting a day off (if you are working active). In a stand-by consumption of less than 1 Watt in the future I will not pull the plug. Second (and last) drawback: sometimes run quickly through the TV channels to watch what's going on so -> None. Long switching times require precise planning of what you want to see. Our TV runs with a CAM module (wg. HD option) and thus the switching times are limited even longer than on the unencrypted channels. It's frustrating.