I bought my D700 from another member about a year and a half ago, and it had a GGS on it. On a recent trip, I managed to bang the rear screen into something I guess, and noticed a crack across one corner. My heart stopped thinking it might be the LCD, but it was just the GGS. I replaced it when I returned from the trip, and the LCD is unmarked. I became a fan of the GGS after that.