i have the XBox 360 harmony remote and it works with TV1 on both my 625 and 722. actually got it setup yesterday and had to call logitech tech support to get the codes changed so that it would work with my 722. my 722 uses remote address 2, (the 625 uses remote address 1 which is what the commands in the harmony database are setup for). unfortunately, it seems you cannot teach the remote the codes for remote addresses other than 1. note to others, when you call logitech tech support, tell the first person you talk to that you need to talk to a level two support person, they seem to be the only ones who know what you are talking about and can help you.