I was using ZS4 as an audio and video editor for my own stuff. I haven't taken anything to "production" with it yet, still using Windows Movie Maker for that. What I've been doing for peoples vids on youtube is keepvid.com -> AoA Audio Extractor -> Audacity. Audacity has a "higher resolution" for the wave forms so they are easier to read. ZS4 is a nice little program once you get the hang of it though.