I have a Harmony ultimate home with a hub, and mini blasters in a closet with a Directv Hr34, and a Sony AV receiver. The hub works most of the time, but it will occasionally miss commands with the directv box. Usually, it misses one of the numbers in one of the favorite channels, or you may have to push a button a couple of times with the guide or dvr list. I would say it probably responds to like 85% of the commands. I don't think it is a hub placement issue, because the receiver seems to work perfectly. Any help would be appreciated