Now for review about Double Decker.
1) As already stated by many, seats are not very comfortable. The bottle holders attached to the front seats are a major irritant. They strike against the knees if you shift position a bit.
2) The overhead luggage holders are very narrow and a normal sized trolley will not fit into it. So all are forced to place luggage in passage.
3)...
more... There is quite a lot of jerking while braking.
4) Charging points are present in every alternate row in both sides. So 1 charging point for 6 seats.
5) Speed was quite good for some time after leaving Bharuch.