If you've got your heart set on the Tata Nexon iCNG, go for it. It is a very practical car, and the variant that you've selected spells good value for money.
The turbo-petrol-CNG combination is quite smooth, and performance is respectable too. Do keep in mind that if your daily commute includes frequent stop-and-go traffic, city efficiency could be on the lower side - around 13.4km/kg; however, on the open road, you could easily achieve around 24km/kg.

