When I test drove the Fit, I listened for road noise/cabin noise because I drive quite a bit. I should have driven the car longer. The cabin noise is simply overwhelming at times. I will consider other tires to see if this helps, but the noise is so loud, it makes the car feel cheap and tinny. Don't get me wrong: I love this car - I just can't stand the amount of road noise I hear. And my wife doesn't like the stereo playing at full blast in order to drown it out!
The MPG is fantastic, but I mostly love the maneuverablity, handling, and ability to park just about anywhere.
Honda has to address the cabin noise. Simply saying that it is to be expected in a car at this price is a lame excuse. If it doesn't improve, this will sadly be my last Honda.