1) speed ---> Very good, one of the fastest trains running in Konkan railway to Kerala from Mumbai/suburbs, at nights it blazes through the konkan rly tunnels.
2) cleanliness ---> Launched 2-3 years back, coaches have to pretty good.
3) food quality --> No pantry hence external caters have to approached, it was not as good when i traveled 2 years back.
4)...
more... puntuality (especially at vasai road to ernakulam junction) --> This is not monsoon season, hence must be punctual. Yet cannot be predicted.