More legroom in a A319 compared to their A320.
More comfort for many large people if they would adjust their A320's to the new seating on their A319.
Feels a bit uncomfortable for passengers with their Change for Good bag.
I thought I was in my local church
Money for a seat
Why not open up (another) page while booking your seat to give a donation going from 1 Eurocent to 100 Euro.
Unicef is a good cause but when coming from a destination where everyone on the street asks you for money then its the last thing you want to experience on a plane.