Comcast delivered defective RNG 110 HDTV box. Constantly goes out. Twice went online. They said they were "sending a signal" to fix problem. Finally asked for a service call. They called at 7:30 am Sunday 4/25/2010 to make sure we would be here. They never came. Called and they said "computer error". Rating 0 on a scale of 1 to 1000. Poor, poor, poor, no make that NO service from them.