The system needs to be tweaked obviously, but if they can keep them short (the two in the Badger game were very, very quick) and they get the right call, I'm in favor of it.
NFL's always worried about things taking too much time, but college football games have always been closer to 4 hours than 3. It's just a much better product and getting the calls right should take priority. I love the Big 10's system.