The paddles work counter intuitively, you have to use the minus to increase regen and plus to decrease it. When you brake the green/blue line thingie on the display gets more blue and less green to show that you are recovering energy. If you incrase the energy recovery with the minus flapper you will find that with the same degree of braking you get more blue, and that the car feels like it is braking more harshly than it was previously for the amount of pressure you applied.