I bought Celerio VXI Auto gear shift on Nov 27th and covered 1000 Kms till today.
It is an excellent car from Maruti. Well tuned engine, which gives excellent pickup with AC on. So far, it has given 17.33 KMPL mileage.
It might improve after 1st service. Basically, it is a car for City driving with burden of pressing clutch in bumper to bumper traffic.