Dman, I have had CrazyBump for a while. Neat stuff. I have not been using it for a reason. Now, I do not want to offend anyone, so right off the bat, I will say that CB is great for its intended purpose, and that is to create an illusion of depth from a photo, etc. However. . . . .
If you look at the results, they are not "models". An example of this would be a nose on a face. In a model, the nose would be elevated up from the face surrounding it and would be symmetrical on both sides. This does not happen in CB, instead, you get a deep cut on one side of the nose and not the same on the other side.
All that said, I think it works really good for complicated scenes, and would be terrific for creating the scenes you see on carved gunstocks, etc. It occurs to me that it seems to work best when there is a lot of detail and the depth of cut is kept pretty shallow.
I may just try a basket weave pattern using it!
"If you see a good fight, get in it." Dr. Vernon Jones