hi there,
i own an alto VXR CNG. i bought it new about one year back. Overall the car is good for the price except for the suzuki quality. my door handles broke 3 times in one year. as for the fuel economy, it gives about 10km/litre with ac in the city. and on cng it gives 110km/one full cylinder (costs Rs. 235 to fill). not very economical for 1,000 cc car but hey its a suzuki. how much can u expect.
engine is very noisy especially with ac. ac works well. suspension is smooth but little delicate. i have had 41,000kms and so far the car is trouble free.
i think overall not bad.