I own an i20 Asta petrol. I have used it for more than 2000 km in 1.5 months.I agree to the above about the "KHATAK" sound from both the front and rear suspension at high speed on the potholes.
I too was a bit circumspect about the suspension. In the first servicing, I complained this to the service executive, to which he told its normal for the car. The suspension won’t be harmed for 35k-40k kms, but rim may be affected.
I don’t know how true the service executive was.Electronic Power Steering is a bit hard when starting from stationary position, else it is smooth.
As far as mileage is concerned, I drive in Bangalore and get a mileage of around 14 kmpl. This is without AC.