I was planning to buy a car since the last 6 months. I did all kind of surveys starting from Santro, Alto to Wagon R. Ultimately I finalized Wagon R and bought it last week. Believe me guys its a wonderful experience driving the New WagonR. Its much more smoother with the new 32 Bit Microprocessor and much safer. The car has a flat torque, so you can also take a turn at higher gears. Thats the magic. My dad also has a WagonR and its been 5 years now. He never had any problem and the car gives a milage of 17 KM/litre without AC and 14 Km/litre with AC. Isnt that wonderful? And its Maruti..u can always depend on it. On the other hand, if you are thinking about Santro, please be sure of one thing.....the maintenance cost. Its damn costly. The spare parts are very very costly. Maruti spare parts are easily available and they are reasonably costed.
So, everyone who wants to buy a new car..I would suggest Maruti WagonR. Its the best fuel efficient car in its category.