We bought the 14000 BTU with dual hose and it arrived on time with little assembly required.  The hoses hooked right up and we put them at the window to exhaust the heat and it was cooling the room in no time.  We installed it in a very large workshop and it does take some time to cool off the room, but it is not completely sealed yet as we are adding a ceiling so it takes longer right now.  Love the remote too, although you do have to be pretty close for it to work.  Definitely a good AC unit.