the ViP 221, the ViP 622 is MPEG-4 compatible but adds a 250GB hard drive for your time-shifting pleasure. That sounds like a large capacity drive, but it can only hold up to 25 hours of high-def. At this point in the hard-drive life cycle, we're a tad disappointed that Dish didn't opt for more storage. The other barely adequate spec is dual tuner situation. The 622 only contains one HD and one SD tuner; even the older Dish models like the 921 and 942 enabled three tuners.