I purchased this car as a daily commuter within the Delhi-NCR in June 2016. The sales executive was superb and prompt for delivery, so much so, that my father had to take the delivery for me as I was out of the station. I purchased Vxi trim with AMT.
If you haven't driven an automatic car before, you will find this AMT to be amazing and relaxing. Although if you have owned a manual before, it will take a while for you to be used to it. The only difference between CVT/DSG/torque converter and an AMT is that you can predict the gearshifts and gearshifts are felt sometimes. Been using this car since then, so far so good. Average FE recorded by me is around 17 kmpl in heavy traffic (with AC) and 20+ on highways.
I don't think Celerio will make the heads turn in awe. It is pretty basic and gets the job done. It is peppier than you think and will get you moving if you push the gas.
Service cost is minimal as well. It costs around 5k for a paid service. I would like to advise you not to bother about MCP, the maintenance contract offered by MSIL as it doesn't make any difference to the normal service costs.
In fact, you will end up paying more than what is required.
Fuel economy. Period. This is the highlight of this vehicle.
Compact car. You will like the size and handling of the car.
Peppy engine. It will do what you want without punching a hole in your pocket.
Build of the vehicle. Doesn't inspire you to push the limits. Frail body and cabin noise is unbearable on patchy roads.