My install was completed last Monday and from what I can tell the interface is exactly the same.
I can't speak to all the technical questions people ate asking but what I find frustrating is if that you can only see the future recordings on the actual pvr you have set it up for. So to me, the only thing that you can do that's networked is watch a recording. Also I'm finding that if youn are watching a recording on thepvr you did not originally record on youn can't use any other features of the guide. Ie you can't watch a recording and flip through other channels or set up new recordings.
I'm finding it useful so far, but then again I was able to get customer care to take 15 off my monthly bill for a year so even with the whole home I'm paying less than before