I dont know if the 670 has any limitations for regular home theatre. I just ordered one from Dell.
Had my Harmony 670 for 2 days now and the button layout is great for DVR users. Works with my Motorola 6412 and the rest of my components perfectly.
I could see how this is a great remote for the average user and how some more technical minded users would like something more sophisticated. Probably what the MX's are designed for. It can do everything my Pioneer receiver remote did to manage my receiver functions, but not as conveniently.
The reality is that I replaced 5 remotes with 1 and my wife isnt afraid to watch a movie using the HT if I am not around.
