I rented an 07 Ion a couple of weeks ago. Put on 993 miles driving around Dallas-Ft. Worth-Houston, Texas, usa. It was a typical rental Ion with power windows and cd player. Here are my opinions after spending a week and 993 miles in it:
Summary: The car is dangerous and should not be driven.
Visibility is poor. Center mirror is too small. Outside mirrors are too small and taper to a point where max visibility is really needed - cannot see away from the immediate sides of the car.
Light rear end. Take your foot off the gas on a gravel road and the car will easily do a 180.
Road noise very high. Good thing I always carry earplugs - had to wear them when going over 50 mph on blacktop roads.
No center off position on the power mirror button.
The window buttons were counter intuitive - push down to make them go up, pull up to make them go down.
No lights on window buttons
The gauges are in the center of the dash. I found it distracting having to look over at them.
The tach is useless for this car, it should be a clock.
Radio was MP3 capable but had no elapsed time or remaining time indicator.
The radio and info display is next to impossible to see in the daytime.
Sound quality very poor. Mushy sound. No highs or lows.
Seat had elevation jack lever but no lumbar support.
Headlights very poor. Night visibility was either 50' ahead or 500', no in between.
Visors are way too small, don't extend, and are totally useless. I had to jam a baseball cap into the side windows weather strip and cardboard behind the center mirror - it gets very sunny in Texas.