Have reservations about network DVRs.
I do lots of dubbing from my DVR onto DVD. Sudden problems with service does not affect dubbing material stored on a personal hard drive whereas it would on a network DVR. Obviously, I'm not concerned about the loss of a twenty-five cent recordable DVD but I would either have to monitor each recording I make or slowly scan each DVD after dubbing from a Network DVR to insure there were no momentary interuptions. With a personal DVR I can leave it alone when dubbing and do something else.