I've had multiple problems with the rf-77. For instance I have a customer who has a mitsu dlp rear projector and all marantz components. The couch in the room is about 20 to 25 feet away from the system. The remote, when being used on the couch, is touchy but once you move up about 5 feet works fine on everything except the dv6200 dvd player. The controls are really sluggish on it and you have to wait a couple of seconds between pushing buttons on the remote to get the commands to go through. Any Ideas???