I agree that the slide/video sync was handy, but I had a problem: about half way through the video, I put the computer in sleep mode. When I resumed, the video played for a while, but it hung where buffering had ended previously, and it refused to load forward any further. I tried clicking ahead, but it still wouldn't load. So I refreshed and clicked to the spot I was it. It instantly started playing, but the slide viewer was stuck on the first slide the whole rest of the time.