Car performance on highways is average. Mileage for Zxi Automatic on highways if you drive under 2000 RPM then you will get 13 to 13.5 km. In city, mileage comes down by 1 which is 12 to 12.5.
No issues with comfort as there is plenty of space for 7 people. I loved middle row space.
Engine performance should be improved as well as gear box(automatic) as sometimes you get frustrated while overtaking.