I am using the nano since 2011 Aug. As of till date the car has never given me trouble neither in the city nor highways.best part of it is the mileage as compared to a diesel car I also an Indica Vista tdi which gives a mileage of 17 - 18 on highways.where as the nano gives around 22 with 100%a/c on.the maintenance practically nil when compared to vista tdi.
Also when compared to driving a vista tdi the nano seem to be effortless on driving. I mostly use the nano for city as parking is much easier. When compared with a maruti 800 its a much better technology. Only draw back is poor resale value. So if u buy a nano don’t think of selling it.when comes to after sales service I live at Mumbai/Chembur M/S Wasan motors is close to my home.
Till date I m quite satisfied with their service also the 24 * 7 service is excellent.its any day better to buy a nano rather a buying any second hand car. trust me as the maintenance is practically nil, also from the time I have bought the vista tdi and nano I hardly have visited the local garage.my longest trip has been from Mumbai to Pune in the nano which cost Rs 1000/- (fuel expense) for a return trip with a/c on.
Also if u planning to buy any Diesel car the petrol is 100% low on maintenance as compared to CNG and Diesel.let me also tell u the cng reduces the engine life buy almost 50%.+lack of availability.