Digital TV has given us beautiful HD images, but if you've repeatedly gone through the ordeal of guessing where to aim your RV antenna, scanning for channels, then readjusting the antenna and re-scanning to see what you missed, you know that is a nuisance.  This device offered to solve that problem, so I ordered one.My 2011 Itasca Sunova 33C motorhome came equipped with aWinegard RVW-395 Sensar IV White DTV/HD TV Antennaand built-in amplifier, so I anticipated that replacing the factory-installed antenna amplifier with this SensarPro would be a simple swap job.  How wrong I was!  The factory-installed Winegard amplifier was mounted on a steel panel in a cabinet above the front passenger seat.  Unfortunately, the opening provided by the RV manufacturer for that booster was dramatically smaller than the opening that is required for this SensarPro.  This was no simple swap job.  Fortunately, I had a nibbling tool in my shop, some good files and old metalworking skills, so I went to work enlarging the hole in that steel plate.Complicating the work, this SensarPro requires screw tabs projecting into the top and the bottom of the rectangular mounting hole.  They're like the tabs you often see on metal electric outlet boxes.  It was lengthy, tedious work nibbling and filing that steel plate, but I'm delighted to say that my work was rewarded.  The RV factory had installed a splitter behind the panel to feed two TV from the original Winegard amplifier.  This SensarPro has connections for two TVs, so I was able to get rid of the splitter, thereby boosting the signal.After mounting this device on the panel opening I made and established all of the connections including the required 12-volts DC, oriented my antenna for optimum signal strength shown on the SensarPro panel, set the amplifier's gain at maximum and ran a TV channel scan.  Having my motorhome parked about halfway between New York and Philadelphia, I was able to pick up 46 digital channels.  The SensarPro instructions suggest setting the gain at 10, but my best results came from the maximum setting 20.  Perhaps if I'm closer to TV stations, I'll need to reduce the gain.  Thus far, I have been pleased with my purchase..