My wife and I took a long-overdue vacation to Mexico, and stayed at an ocean-side resort over the holidays. At check-in, the desk attendant told us they would upgrade us to an ocean-side room for free. Great! We were looking forward to having a nice view. Five minutes later, he came back saying, “I’m sorry. It turns out the room is already occupied.” The result? While rationally we ended up the same, emotionally we were disappointed that we lost the opportunity for the ocean-side view. Bad data made a worse customer experience.