Since the 5709, I've experienced faster reponse times on both sides, although it was only supposed to help the Tv side.
The bad:
1) Digital recordings audio comes & goes, and one blank spot for 6 to 10 secs. Don't mind not getting complete movie in 5.1, but streaks of no audio at all is terrible.
2) Power offs on both sides and still can't get to customer service or tech at Dishnetwork without a power off.
3) Have missed the first parts of recorded movies, not the endings.
4) One min. recording has showed up a couple of times, but they were in error, as the recordings were complete.