Official Xbox Magazine
NASCAR 08's driving model is so demanding that you should probably stop diddling with those half-inch thumbsticks on the stock controller and buck up for Microsoft's wireless wheel. With physics this good, it's a worthwhile upgrade for NASCAR fans. [Sept 2007, p.77]
NASCAR '08 is not a bad game in any sense of the term, but neither is it fantastic. If you're a racing fan or a NASCAR fan there's stuff to like here and even if you don't care for NASCAR itself it's still a competent ride.
Cheat Code Central
If you're a NASCAR fan, then you'll probably really like this game for the detailed tracks, driver roster, and stock car specific racing features. If you're anybody else, you'll probably be bored and give up due to the learning curve.
NASCAR 08 is a decent racer, but it feels like a classic example of a game where the developer put in limited effort because of the lack of competition.
This generation is drowning in impossibly good racing games. If you want something technical, you've got DiRT, if you want something easygoing, you've got SEGA Rally, if you want something cool, you've got PGR4, if you want Nascar 08, you've got problems.