i've kept alto for about 2 years. I've also kept cultus, mehran, cuore and santro. Amongst its competitors, Joy, Cuore, Mehran, Santro... this car is most comfortable.. and believe you me, its road grip is much better than all of its rivals.. its AC is much much better than any other 1000cc car available locally, including cultus. Fuel economy is almost the same as cultus on petrol (19/20 se ziada ka faraq nai he) and on cng it gives same mileage as cultus.
Negatives: its front seats has little lesser leg room compared to cuore and cultus. Its steering is heavier compared to cultus.
Leg room wont matter much if you drive mostly with just front seats occupied as u can push ur seat back. and for steering, one can install a japanese alto's power steering in it, it'll be a bolt on fitting.