If I change something on one set-top box, will it change on the others?

All of the features are set-top-box-specific, meaning that changes on one set-top box will not affect the other set-top boxes. Each set-top box can be customized to different specifications. Recorded programs on the DVR, however, are shared throughout the house by each set-top box. This means a show recorded on one TV will be accessible on all of the others.