On a free miles trip, one leg was from Chicago to Frankfurt on Luft. Prior to boarding my wife and I were ask to change seats so a family could be together. No problem, we have traveled when our kids were young and sometimes you are not able to get seat together. Then we are called up a second time to change seats, again no problem. As long as I had leg room I would make the change (I'm 6'5"), their reply was that I would have no problem. This was our first overseas flight and did not pay attention to the seat number. When we entered the plane we found out we were bumped up to business class. Way to go! Sure made that overnight flight comfortable.