I do not have it but have read a little about it. Its primary claim to fame is a total of 36 (I believe) HD channels, in addition to 30-35 SD channels. Most of the HD is proprietary, but they are negotiating with HBO, Showtime, etc. So far they only sell through Sears, and are supposed to come out with a box that has DVI, Firewire, and Component outputs and HD "Tivo" like recording. HTH.
BTW, the initial cost is around $750, and I believe the initial monthly cost is $39.95 per month.