Cleanliness --- Sleeper & General Coaches are in a pathetic shape. No idea about the interior if you get a freshly POHed one.
Punctuality -- Nowadays gets delayed in SER itself.
Food...
more... -- Dinner orders will be taken post KGP. Order then and there or you can order via E-Catering or take food from KGP, TATA, ROU. Local Hawkers keep coming up to sell snacks and Tea
UR pax capture the seats near to the door in Sleeper Coaches.