At the Dulles International Airport, they have stands with three or four physical buttons, each button is a smiley face (angry to happy) to rate your experience

At the Dulles International Airport, they have stands with three or four physical buttons, each button is a smiley face (angry to happy) to rate your experience. Those stands are scattered all over the airport. Every time I fly through Dulles, I leave a rating because it is so easy to do and doesn’t slow me down. I think a similar approach would work well for physical stores. They can be installed near the exists, so customers can leave their feedback on the way out.