I thought for sure my-600 had the corrected sticker on the bottom but it was only a refurbished sticker & finally overheated & died a few days ago. I'm also not sure if it matters if the non-dvr's run hotter when being used or are always on like the DVR models but this unit was in the main TV room & always on & being watched. Anyway, DTV Fed'xd a refurb H20-100 & appears to like the SWM setup I have. It lasted 3+ years so I can't complain about it being defective out of the box.