I bought A star VXI in June 2010 and I have drove 43000 km so far. Its an amazing car and 0 maintenance. Servicing at evey 6-7000 km with oil and oil filter change. It give mileage of 15-16 km in Pune city conditions and 19-20 on highway.
After 18000 km I fitted Lovato CNG kit with Timing advancer. Warranty Void but who cares if you look at savings. My car gives 26 km/kg in City and 32-33 km/kg on highway. I recommend this car.