When I was on the vacation I and friend decided to go to the Chennai and the Madurai actually that time we were not familiar with the Vaigai Express but one of my friends said about to travel via Vaigai express.
The availability of tickets is average the train was full with the passenger.
In comfort point of view, the Vaigai Express is available but it is ok than travel by bus because the ticket price of the bus is more than the Vaigai Express.
Only I can say the Vaigai express Was more reliable. The train is available daily.
The food is available on the train the quality of the food was quite good. We can find verity in the food the veg and the nonveg food is available on the train. One can take food on Chennai station and Madurai station.
The toilets are not clean the bad smell was coming from the toilets.