Another satisfied HDR owner here!
I got fed up with the sixty odd quid per month with Sky, and the constant failed recordings due to power cuts, bad signal, etc, etc. I have been running the box for a few days now, and think it is fantastic.
Having read through the whole of this thread, there are a few items I would love to see; particularly the ability to record the contents of the buffer (much like Sky+), and an HTTP server on the ethernet port for guide access and recording instructions (I used to use Sky's remote record feature a lot too

)
However, what I would really like to see is some work done on the Back and Exit buttons on the remote - in particular, the following scenario:
If I click the Play button, information about the buffer is displayed. If I press the Back button, the buffer display disappears, and a symbol apears top right indicating that this function is prohibited (or something like that). Pressing the Exit button removes the buffer display without showing the symbol. in the top right corner.
Now this is the bit that really grates me, and has on several occasions made me miss part of a program. If i press the 'i' button, the information plate appears (and remains there forever). Pressing 'i' twice more gets rid of it; pressing Exit gets rid of it. However, pressing Back (which is what I'm mainly used to doing) results in the box changing to the previously selected channel without any warning. As a result, the contents of the buffer on the original channel are lost, so if I've rewound or paused for any length of time, I miss a large chunk of the program.
It wouldn't be so bad if there was some warning when changing channel if you are not watching live TV. Although, I don't really see the point in the Back button going back to the last channel.
It also seems that certain functions will require the Back button, and certain functions will require the Exit button. I think these buttons need to do what they say:
Back - Go back a screen/menu/window/etc. Further presses will take you further back until you are back to TV.
Exit - Go straight back to TV.
But I have to say, overall, I think the box is excellent. I've been using Sky+ for years now, and it took no time at all to get used to the Humax.