Okay the DS screen protectors I bought are from a company called Gamemate... I dunno some japanese company, all of the writing on the package is in japanese.
Anyways, the problem with them is that they are sized slightly too small... When perfectly centered over the touch screen, it leaves about .5-1 mm of the screen uncovered on the left and right sides, also a tiny gap open on the top and bottom as well. If it wasn't for this small flaw they'd be great, they are very easy to apply and look great, they dont' make the screen look bad or anything.
Azure - no I said I was NOT rubbing it hard at all... I said that as I was playing the metroid demo, I was trying so hard to be light with the stylus on the touch screen, that the game was having trouble registering my movements, and I was having problems aiming properly. The touch screen had literally been untouched up until that point so I very badly wanted it to stay pristine. With my last DS, the one that Nintendo replaced for me, I had played plenty of metroid w/o getting any scratches... I only got scratches after I bought Feel the Magic... that game does require some frantic rubbing on the screen for some of the mini games, and after beating that game I had 4 or 5 scratches. And no, I dont believe I could easily photograph the scratch... it is a hairline scratch that can only be seen from certain angles or under certain lighting conditions... it's VERY easily noticeable outside in daylight though, and is very annoying.
I need to find some better screen protectors ASAP. Just today I picked up Wario Touched and Yoshi's touch and go, but my wife is going to hold on to them and play them on her DS for now. She has one of those ill fitting Gamemate screen protectors but isn't bothered by the gaps.