In this home office/study, they used them as part of the lower panels below the chair rail. It frames out the "alligator" textured wallpaper.
This kitchen used them around the door frame and the cabinetry. It adds that subtle touch of a finished product you rarely see in a room.
More obvious in this photo, they were used in the foyer to frame out the panels with either fabric or wallpaper. I noticed they bring more attention to the family photos.