I bought a Flip video camera and used the included FlipShare software for the first week. It did a fine job of editing video clips. Then I got iMovie. The first thing I noticed is that where FlipShare would take about 3 minutes to download 800MB of clips, iMovie took about 25 minutes. I could see that iMovie was converting the MP4 files from the camera to MOV. The MOV files are more than 3.5 times bigger than the MP4 files. What is the point of this? I don't see any difference in quality and, all things being equal, I would of course prefer the smaller files.