It works very well at keeping my child off the TV 24/7. The thing that I hate about it is that it has some kind of sensor that turns Bob off when the TV is turned off. The problem is that it turns it off far more often than it should. Just a few days ago it turned it off twice in 30 minutes. I've never had it go for more than a hour or two without turning it off. They really do need to make it so that you can disable this feature.