I can't really tell the difference how good it is compared to the orignal DS.
You can switch it back to the normal DS screen size by holding start and select after clicking on the play/app button of that DS game. Only difference is that its smaller and the resolution looks very amazing. (to me)
Taking the Dustiflier easily for KH 358/2 Days :http://youtu.be/XH6LFvUVrjM
I personally don't care as much about resolution as much as I care about using as much of the screen as possible. I love how I can resize the screen on the PSP when playing ps1 games on it, but hated that there's no options to use more screen size on the 3DS when playing DS games...
"Reach out your hands, out for the ones who need it when times get rough. Times will get tough, just get up again." -Flaw