Used this in a large house with 15 TV's when Rogers went digital.

[Link: pviusa.com]

2 Cable boxes, 1 DirecTV and 1 Apple TV sent throughout the house. Added control via RF /IR RTI remotes and RTI RM433 Antennas placed wherever I could get them.
Most TV's are in guest rooms and areas where you are not going to get issues with too many people trying to watch at the same time. Client has his own Cable boxes, DirecTV on main TV's or areas he uses regularly, so no guests interfere with whatever he is watching.
Picture is good and it works fine, just a bit slow between button press and channel changing.