Good city commute. Not for Highway

Bought in 2014 - Magna+model for 4 lacs on road (1st year insurance was free). Positives: Car is good for short city commute (which was my requirement). Mileage is good (18-19 in Noida traffic) and styling is premium. Interiors are okay for the price I paid. Hyundai service and support is good - low maintenance cost so far. Negatives: Vibrates on lower gears when AC is on. Car is light so may not be suitable for highway driving (not expected also - this is a low end car), but this is the major reason why the car gives good mileage. Boot space is very less - of course this is a known.