It's not just that you can't watch on a 4th TV. It mainly pertains to the DVR. They advertise that you can record 4 shows at one time. Well, you only get one TV, so they all would have to be recorded on one TV. While you are doing that, neither of the other 2 TVs can be watched. It won't let you. Unrealistic to be recording 4 shows at once, you say? True, but it is not unrealistic to be recording two shows at once while watching another on a TV. And while you are doing this, only one of the other 2 TVs can be watched. It's not a huge deal, but it is not something they told me about beforehand. All they said was "You can record 4 shows at once." I just felt they misled me a little. But overall, still much better than Comcast.