I purchased this for our apt.  It is a "through the wall" unit as opposed to a window unit.  It cools well, but the unit is loud, regardless of fan speed selected.  Even on "low", it is loud.  Also, the energy efficient mode, which cycles on/off every three minutes will make you want to throw yourself off the balcony.  It drives me nuts, so I never use it.  I understand these units are not quiet, but did not expect it to be this loud.