Some cars are (much) noisier than others with windows open.
Our VW Touran (another small minivan type) was making a horribly loud noise compared to anything else we owned.
Helicopter noise comes in all cars, open the front window slightly and opposing rear window to relieve.
I am the person who wrote the above review. This is an update. It has been 1.2 year (14000miles). I drove the car to another city on highway (65-75 mph) for 1.5 hour. After a round-trip, I got 24.7 mpg on highway. It has been improved.
Heli noise is called the Doppler effect. It could be really painful to the ears, some cars would be worst, adjusting windows opening is a good hint.
Wow.. AC malfunctioned, seats get dirty easily because they are cheap, wind noise hurts your ears, gas mileage less than expected and "Suspension noise and no good feeling." as you put it... and you give this vehicle a 5 STAR RATING?!?! What does it take to lower your score here?
This is why manufacturers keep producing low quality cars... because no matter what they lack, people still love them. To me a five star car would perform flawlessly over the entire time I had it needing only minor maintenance. I have had only a couple of "five star" cars in my garage over the years. This would be a three star at best for me with the problems you've listed.
I understand that Kia Rondo is not a 5 star car.
Recently I got 14 mpg in city. Gas mileage is very disappointing.
I do not see much difference btw in city and on highway. Average 50/50 is about 20 mpg.