Mumbai metro - costliest project of India and congress started in june 2014. Initially they had a lower rates for the promotion, but then gradually they inreased the tickets price and had smart cards too. It connect the places where the travelling time have now become very less. People are taking benefit of this project and services.
The coaches are very clean and the main thing is they have air conditional coaches. The station are also very clean and the infrastructure is mind blowing.
Security system, timing of the trains, mechanical system everything is running very smooth as of now. The electro magnet coins and smart card are design is such a way that u just have to swap the coin and card upon entring the station and while exit u have to again swap the same. Very well design system by reliance. Hats off.