Recently purchased GGS Screen Protectors for my D700, D300 and D3s. The fit on the D700 and D300 is perfect. I purchased the version 3 type which are a snap fit for the back of the camera and an adhesive fit for the top LCD. The fit on the D3s is a tad loose but I think it will stay on. The look of all three is perfect, you wouldn't even know they are not stock. The glass seems to clean just as well as the original screen does and the view through the screen protectors is indistinguishable from the original.
I would rate these screen protectors very highly and the price is quite reasonable. Compared to the old plastic ones I used to use there is no comparison, with the GGS Protectors being clear and easy to see through.
Just get them.
Here is a picture without the protector and one with the protector: Note that my original screen has a couple of scratches and some dust fell while I was taking the second picture.