First of all I want to tell everyone the technology evolved till date is 4D and 4D max. This is simply a trick to attract people to visit them once.
As far as I experienced this is total waste of money that too for a 30 min movie.I was waiting for it to end and leave the room.Minor effects of 3D were there with smells and feel.Please don’t get fooled by 7D, 9D or any D. I think people should search before going for it.