Works well.  Just a few pieces of advice/info: Barn doors do not block light, sound or smells at all as well as regular hinged doors!  And be sure to make the door opening a little less than the actual width of the door you choose --since the door hangs on hardware mounted on the wall there is a natural gap top to bottom away from the wall.  You don't want there to be gaps on the sides as well! (Our contractor didn't know that...)