Well, on some games it works just fine... On my SD835, I'm almost finishing ZeldaTP (with Hyrule Speed Hack, the lowest the FPS gets is at around 25fps, and only sometimes, at the Hyrule Field), I've played ZeldaWW a lot, too, stays constantly at 30fps...same for SMS.... MKDD stays at 55fps+, and while MKWii stays mostly at around 35fps, with the gecko code for 30fps the game works almost perfectly, except for the rectangle on top left of the screen that happens only at some circuits...
As for games that are unplayable, one that I checked was NFS:MW, which always stay at very low fps...
As for games that are unplayable, one that I checked was NFS:MW, which always stay at very low fps...