The coming train information announcement was difficult to understand which made you worried that you would miss your train.
The lights were on the train 24hrs and the staff and people talked very loud which made you hardly sleep in the 2nd class AC sleeping cart. Also the AC was very cold which contributed to the sleepless.
Everything super smooth. First Class Sleeper cabins are awesome, though I was impressed by 2nd Class cabin too, only a curtain for privacy but hey you're sleeping anyway!