I bought this recently as our son and wife were coming for a visit.  I bought a window unit but because I had replacement windows it involved a lot of modifying to make it work.  This way, it was as simple as ABC.  Simple installation kit for the window, connected. to the A/C unit and bingo:  success.  Works extremely well.  Cools more than sufficiently.  Very satisfied.  LG lives up to its reputation.