OLCI pretty close to the 24 hour mark on DFW to IAH this afternoon. Scored an upgrade to 1F for the ~45 minute flight. Moments before boarding, heard my name called from the GA. When I approached and identified myself, was told he had bad news. Due to "equipment change" they had to downgrade me back to coach. Before I even had a chance to process the "bad news," he told me that they re-seated me in 14F exit row, had two drink coupons and a $100 cert as compensation.
All in all, a pretty sweet deal, especially for such a short flight. But it didn't even give me a chance to really get upset. This is exactly the kind of pre-emptive action that keeps a customer happy.

Good job CO ^