Wagon R is a very nice and comfortable car. In My family we are using since a decade. The comfort and spacious feeling I felt, is nerver felt in any other car of this segment. I always dislike the exteriors and the bulky type of looking of this car but this is the main reason which makes spacious interior. It is a very good car for small families, riding short trips as well as long trips fuel efficiency is better than average. Engine sound always smooth in low to high performance levels.
The main advantage of owning a maruti car is you always find a service station which you rarely need. though we have a SUV I always wanted to take my wagon R. city or highways no problem as you get a good turning radius good around clearance, batter handlling and last but not the least the Mileage. So if you love driving try considering a wagon R for your family.