I have had great success using the workout blender for XTrain and LIS workouts, and love the ease of the application. For some reason, however, there are workouts that will get to 10% and freeze, have chaptering errors, or come through the blender distorted ( voice doesn't line up, or picture itself is scrambled). I hadn't received a reply from tech support yet, so I thought I'd experiment with iMovie. It does actually work. You don't get the nice chaptering, and it takes a lot more effort than the workout blender, but it does do the job if you want something to work with to make pre-mixes and custom workouts until your blender is up and running. Thought I'd pass that along in case it may be helpful.
