Mine's pretty unscratched (two barely visible scratches, I think), not even my 256 pt score in "shake trees" in Wario Ware left any traces. I used the DS pen, a PDA pen and a Wacom one, in ascending order of hardness. Of course my DS hasn't seen much use, I only played through Wario Ware and not much after that. My PDA's screen is in a worse condition.