I actually don't remember using it in anger. And now that it's been moved to the !!!! pile in the cupboard I don't think I ever will.
MJ, it wasn't me that bought the see-through VOR roses. I did come to my senses in time to prevent that. I'm also still using a single ruler and protractor, and I've so far also been able to withstand the urge to buy a circuit direction calculator. In fact all of the junk in that pile was either given for free (like a Spirit-of-St.Lewis memorial clock thingy, came for free with a Flyer subscription) or is totally non-aviation-related.