Extremely uncomfortable seats. There is very little space to sit and absolutely no space to stretch the leg. There is almost zero recline. Change the seating from 3* to 2*2 and reduce the number of rows.
------- Edited on 2018-04-18 -------
Seats are cramped. But, running time and service is good. Suggest that railways introduce a higher class with lesser number of seats (about 50) and higher fare (but lesser than Shatabdi). Try this with a couple of coaches. This would make travel much more comfortable.
------- Edited on 2019-03-11 -------
Most uncomfortable ACC train. Solution: 1. Remove at least 10 rows 2. Remove one seat from the 3 seaters. These would increase the space between rows and also a normal person would be able to sit comfortably. As of now, it is too cramped and the seat is just ok for a skinny person.
3.The backrest is too straight. Make it sligthly reclinable. 4. AC vent just just above the head which makes it very cold. And usually the ac is on at full blast. Reduce AC and also put the vent on the top (not below the luggage rack)
This is true for all double decker trains.