I have seen MW on 3GT, 335is and M6 and it is a good looking color. Its not a pearl like color or yellow in any way. It is just a metallic white. From a distance and without direct sun, you almost cant tell it apart from AW. AW is brighter and whiter.
I think all the ferric grey bits will look good with the MW. I really want to see it with this car. If I do, I will be sure to take some shots and post them