1- mileage varies very much with this vehicle dependind on how you drive, very carefully driving and not accelerating like crazy after a traffic light and speed breaker gives you around 13-14 km/l in city which is exellent for its class but otherwise driving hellishly drops it to 9 km/l.2-comfort level beyond extraordinary !! unusual amounts of leg room and space, better than any car ive seen except large Suvs ! corrola civic sab farigh hain is ke samne.3- spareparts available but from karachi and that adds to some costs4- 1.5 vvti DOHC engine with CVT sport mode on beats a corrola altis in drag , trust me ! although the altis was auto so maybe thats a disadvantage. performace on hilly areas and muree wagairah is also amazing.5- ive checked with toyota walton lahore and they say the entire engine mechanics is of corrolla and computer systems of vitz/ belta 2NZFE engine , har corrola mien ye hota hai bhai,6- you have to drive it to belive it, i dont why is gari ki market nahi chari, ground clearance bahaut achi hai aur road grip bhi kamal, 16 inch yokohama par ye road par terti hai. i love ractis !!!!!!!!!!!!