Take, for example, Speed Racer. After Nintendo announced the peripheral at last year's E3, WB Games approached the company so that they could test it out with Speed Racer. In an interview with MTV Multiplayer's Tracey John, Jeff Nachbaur of WB Games stated that it took some tweaking to make sure that players wouldn't oversteer with the wheel. After a lot of testing, though, he says that they've managed to get it just right.
Nachbaur also said that the Wii Wheel doesn't add much of a difference in gameplay, but most testers enjoyed playing the game with the wheel rather than with just the Wiimote alone. So, if you like racing games, you can at least rest assured knowing that the Wii Wheel won't be some peripheral that you chuck away and forget about once your done playing Mario Kart -- assuming, of course, that you'll ever be done playing Mario Kart.