It drives exactly like a Neon. Steering is very tight and the ride is very good. It doesn't drive like a van or SUV, which is the impression that can be got when looking at it.
The intake is adequate for the engine, but the World engine is said to respond very well to breathing modifications. A better air filter would be all that's needed until CAIs and wider TBs are made availible.
The MPG is given through a digital readout that gives "to the tenth" information about milage. (24.5, etc.) It will change based on throttle position, engine speed, mixture, barometric pressure, air quality...etc.