I have found the RVU interface to be very unsatisfactory with Genie. Lots of issues.
The speed is definitely the main issue, even slower than a client box which is too slow IMHO, but here are some ot the other things you will probably run into:
o Sometimes, when using the Samsung remote, while clicking fast forward, it will jump to the end of the recording. At first I thought this was fat fingers hitting the fast forward and one of the other buttons next to it, but even when being very careful this has happened.
o TV "loses sync" with Genie. Sound gets all garbled and image distorts in an oscillating fashion. Turning TV off and back on fixes.
o Playlist menu changed itself to a yellow background (happened last night) making it unreadable. Turning TV off and back on fixes.
o Several times when trying to fast forward or rewind, the TV totally disconnects from Directv and reconnects.
This is a new house with a very clean network infrastructure. DirecTV insttalled by DirecTv.
We use it, but it is pretty painful! Thinking seriously about just using a client box. Before this, I was excited about getting a Samsung ES9000 to replace one of our other TVs because of the built in RVU, but now I don't feel tied to Samsung, since RVU is not a plus.
Bottom line: if DirecTV is serious about RVU, they need to work with the TV vendors to make it work,