This was an expensive Air-Conditioner ($500) used two summers, it cut my electricity bill in half. I used it mostly in the master bdrm but on the days when it reached 110-115 degrees I rolled it out to the livingroom in the morning & back to the bedroom at night.
It will keep your bdrm down to 65 degrees at night, no BS!
I just purchased a Solar System so that way I don't have to roll this around the house and my electricity bill is now about $65 per month running my A/C 24 hours a day.