Yes in my personal opinion tata nano is a really bad car.I am saying behalf of my experience with tata nano and yes it is not good because it has a great problem in its ac and gear box.
I bought a second hand tata nano last year and model is 2014 in 1, 20, 000 rupees from a motor vehicle shop that sells second hand vehicles. And from that day to today my car countinously irritating me.
It stops working in the way and also not good in driving and ac is also bad and also have problem in gear.average of the car is also not good.my car’s average is only 14 kmpl and pick up of car is also very low.I hate this car.
At this typey experience with tata nano is really vary very bad and I never suggest anyone to buy this carr.