(1) Rate Experience
Draw a geofence set to 'on exit' around the area where your users are based (i.e retail store). Create a simple campaign that has two buttons such as 'Yes, it was great!' or 'You can do better' that is linked to a customer feedback portal of your choice. e.g survey monkey.
(2) Customer Survey
Draw a geofence that is set to 'on exit' around the area where your users are based (i.e airport). Create a simple campaign that asks users for their opinion with a link to a customer feedback portal of your choice. e.g survey monkey.