You have probably all encountered those satisfaction meters which ask you to rate your satisfaction by pressing on one of three buttons usually color-coded or labelled with smileys or both. I see them a lot at airports, after security or in toilets. Do you ever wonder (as I do) what happens with the collected data?

Praise to Lyon airport because they actually closed that feedback loop and let their customers know what their customers think. 133 464 votes and 74% satisfaction.