We were buying a ticket for my wife visit her family, and I noticed that when we were doing the seat selection, some of the seats were labeled "Premium". It said that they varied by airline what you need to sit in those, but it would allow anyone to select that as their seat. It said it was at the Airlines Descretion of whether or not to allow you to sit there.
Has anyone had any experience with this? Should I put her in those seats or is she going to get moved to some crappy seat if I try it. She will be flying on United.