It's difficult to say how often it is used. Most of the people on this board don't watch commercials that much. In fact, you're liable to get snide remarks like "Commercial? What's that?" or even "You're using your TiVo improperly." Personally, I sometimes watch a commercial if a flash of one gets my attention while I'm skipping and I think people should be free to use their TiVos in any manner that pleases them. And yes, I have seen the "Thumbs up" to record before. I think I've even used it once or twice.