We live in a 3000 square foot condo with two AC units.  The one servicing our main bedroom and bath is at the opposite side of the condo, so when it is upper 90s+ there was no cool air by the time it traveled that far.  We were given an LG portable unit and were grateful for how it cooled the main bedroom.  We bought this one, a little smaller than the one we had, to use in the main bathroom.  I especially like the "timer" feature.  It doesn't have to run all night.  I set it for about an hour or less before I get up and the room is pleasantly cool when I get ready.