Bought one last year in april and it's a trouble free car uptill now, Alhamdullilah.
The millage is good.I personally got 870 kms on one full tank (within city). It gave me approx. 18.5 kms/l.
But still i wouldn't suggest that you buy it, coz most of their meters are reversed and you don't know the exact millage and you never know when is the battery gonna die. And Secondly, the prices of the spare parts are sky high. Mechanics charge you alot, for minor repairs.