Yaar I think that rather than buying Baleno (Only for factory fitted CNG charm), one shall buy Honda City and there is definitely no harm in having CNG in City coz if one can save some money on daily running and can have the pleasure of petrol ride whenever wants to, then rather than driving baleno, driving City with CNG is recommendable. What factory do is not at all different if u have CNG fitting from some good place. And believe me, u'll enjoy Honda City iDSI drive when its not heavy on your pocket at same time.