Santro is certainly one of the best cars in small car segment doing rounds on Indian roads. Its smooth, sturdy, and absolutely safe apt for indian conditions. I just got back from ludhiana viz approx 300 kms from Delhi and covered the journey in flat 3hrs 45 mins (leaving at 5.30 in the morning helped a lot though. Though I would rate this car as drivers delight at the same time it does not offer the same experience to back-seat drivers especially when you have three of them occupying the back seat.
The engine is noiseless(so far)and manouvrability is fantastic and the bottom line fuel effeciency is not bad either at about 14 kms/ltr.
All in all its a car that I wouldnt mind investing in once again