It's pretty much free. You can assign every video to midi triggers (so in theory, add a beat machine and you got your bpm synched/triggered video) You can trigger video loops,flash movies, fades based on audio input, all kinds of crazy shill. You can also mix in webcams.
It can act as a DMX repeater (if you have 2 entec boxes) It's also designed to be a controller for LED wall applications.
So you can control the video mixing with your DMX controller if you wanted to as well.
Here's all I do with it. I crossfade cams based on singer mic audio all nice and automatic like.
http://www.justin.tv/blrj32/b/271694721