It is superior to both Sorenson Video 1 and 2 (the camera movement detectors in these suck royally) and h.263 (pretty awesome codec for being over 10 years old). However, I have played with betas of Sorenson Video 3 and it is better than ZyGoVideo. Therefore, I suggest you wait until the release of Sorenson 3 (which is, btw, the best codec for any format, way better than Real 8 (over which I prefer Sorenson 2) and WMV 8 (very efficient, but asf/wmv is a very poor container format. the timecodes are, like, messed up, and it only supports 2 track types.) Soon, Quicktime will not only be superior in under the hood technology, but also in visual quality again. Qdesign Audio 2 has continued to reign supreme, of course.