i used it quiet effectively as you mentioned above. What happened to me is that MILD is a dream incubation tech as well.
Once I dreamed that I had found a toadstool. I used that dream a couple of nights for MILD. Some nights later I had a dream in which I was was walking through the woods and came across a toadstool. As soon as i saw it I mad an RC because I already knew that I was dreaming.
The same happened to me with dreamsignes. Doing MILD with an event that is most likely to happen anyway is much more effective. There was a time I never failed my dreamsignes and through MILD they even multiplied...