Fairly easy to assemble even with one person.  It works but it is much more difficult to pull the extension out than it looks in the video.  Its not easy and when pushing it back in it caught the elastic on the mattress cover and tore it all apart.  Probably would work better with a bunkie board on top of the slats to prevent catching the sheets or mattress cover.  But it serves the purpose.  Daybed converts to king when needed without taking up all the floor space in the room when a king isnt needed.