I have it on my latest one, just so that I can tell it apart from the Nailbomb it replaced.
Also, I don't know if it was somehow removed during the engraving process, but the front corner of the pickup closest to my pick (i.e., the top left when you read the etch) is worn down to the nickel along the edge. It doesn't bother me, but I can feel it. I guess it will give it a more 'vintage' and 'road worn' look as the nickel gets old, so that it looks like I wore it off with my ten hours of practice per day :)