We received an upgrade several years ago when we were staying the first night of our stay at the Animal Kingdom. I had purchased a room for 1 night at AKL so that our DD could see all the animals, and then we were starting a 7-day package at the Beach Club. The same Disney agent handled all the arrangements for us.
When we checked in, they walked us up to the room. When we stopped before the double-doors, we knew that something was wrong. She had upgraded us to the Vice Presidential Suite at the Animal Kingdom Lodge!!
We were convinced that we were in the wrong room and that there was a mix-up on the reservations. We kept checking with the front desk, and they kept insisting it was correct. I wouldn't let our DD unpack anything!
It was a huge suite -- kitchen, dining room, tv room, 2 bedrooms, 2 baths. It's the only time in all our visits that we took pictures of the room - just so that when we came home that everybody would believe us!
We definitely did not ask for anything like this, and it remains as the most magical experience that we have ever had at WDW (and it was well before the "Year of a Million Dreams").