I'm new to DirecTv. I have been a customer since June 7th. I orginally got an R15-500. I started having problems with it not long after I got it. I kept getting the searching for satellite signal on an intermittent basis and at times pixellation. I finally called DTV support and after going through all the checks they set up an appointment with a repair person. He came out and found the problem. It was a voltage problem with the tuner. Tuner 2 in fact. So he replaced the R15 with a R16-500. It's now working great! So far after using it for a few days I really can't find any difference bewteen the R16 and R15. Are there any? Or are they just basically clones of each other. If there is any feature I'm missing please let me know. Also the service so far with DTV has been superb! The repair person as well as the original installer were very professional and courteous. They knew what they were doing and did it well. Much better than the other satellite competitor.