Surprisingly Bad.
The Need for Speed Franchise continues on with the street racing through Need for Speed: Undercover, and to be honest it is probably the worst NFS game I've ever played. From the graphics, to gameplay to even the system requirements, the game is pretty much broken.
Gameplay has become somewhat more 'arcadish' than from the previous NFS games. Most likely to target the more casual gamers due to its easy difficulty, but even a casual gamer will say "This game sucks" because it's just that bad. The storyline of the game is mediocre and the acting in the cut scenes are pretty horrible.
To be honest the game seems to be unfinished. The main menu of the game feels like it hasn't got much. The Frame rate on the graphics is sluggish even though my computer's performance is beyond the system requirements.
So to sum it all up, Need for Speed: Undercover is probably the worst of the series. It feels like its targeted towards a wider audience but seems to do it all wrong.