If you have a tuning adapter, there are reports that it keeps suggestions from working properly on TWC. I can't find the thread where this was being discussed.
Roamio Pro (3TB) on MoCA
Premiere Elite (2TB) on MoCA
Premiere (2TB upgrade) w/ MoCA adapter
Premiere (320GB) w/ MoCA adapter
Left DirecTV 4/15/07. Left TWC 8/8/11. Now on Comcast Xfinity.