If you're on a receiver and hit record, it will ask you which DVR to record to. If that DVR isn't available (already recording two things during that time), it will tell you and you can select another one. This cannot be done from one DVR to another, only a receiver. You cannot access the series manager or to do list. The H25 is really fast, the H24 should be as well, the others not so much. The biggest limitation of course is that you can't pause/rewind live TV and the no access to the DVR lists. DirecTV won't lease you more than one HR34.