Since getting the 3DS XL I figured I would see what the two DS cartridges for Atari's Greatest Hits are like using the circle pad. I must say it's a notable improvement.
With apologies for my outburst to JeffVav last year, using the 3DS circle pad makes Red Baron play a great deal better. It's not entirely perfect, moving the pad too much seems to throw the in-game joystick out of whack and you sometimes need to wait and let the plane straighten itself out but it's a heck of a lot better than the old DS d-pad way of playing.
I had hoped coin-op Tempest would have worked with the circle pad acting like a spinner, maybe I could roll round and round given the circle pad is circular as well? Alas no. The controls are really more like a cylinder (in fact in one control scheme you see a drum rolling on the bottom screen) so it's not like you can rotate the circle pad counter clockwise and have the yellow thingy you control move counter clockwise. But it's still a pretty good improvement.
I tried Circus Atari and alas the circle pad is too slow, that's a game better played using the stylus still, as is Super Breakout.
But I wanted to share my findings. Playing the Atari Hits on a 3DS using its circle pad breathes new life into a great DS collection.