I am owning Indica Vista-Tera model since Jan11 and trust I am the satisfied customer of Vista..i am traveling 60 KM on daily basis and that to with AC and I am getting 16-17 mileage and for long run almost 21+. In terms of heavy riding it is always smooth riding on the highway..easy to drive good comfort / good AC / nice leg space / etc.
If you are looking for good Diesel car with below 5L cost then this is ONLY good choice for you..so please go for it