We are using the air con unit to cool the bedroom down for sleeping and while it definitely cool's the bedroom down it does giveout a rather loud white noise which is a bit too loud for me to fall asleep with and stay asleep. My partner is ok with it so we are switching on the machine an hour or so before bed and then trying to turn it off when we sleep or leave it set up on the timer to turn itself off. The other thing I noticed when unpacking and setting up the unit is the "window kit" mentioned in the description is just 2 pieces of plastic that will seal a sliding horizontal window and there is no mention of needing a proper window kit for windows that open using hinges so we have needed to order one of those too to stop bugs etc from getting in through the open window. Once that has been set up aswell I can see the air con unit being quite useful as the window kit does completely seal the opening from bugs and rain etc. All in all its not perfect but a workable alternative to hot, sleepness, stuffy nights once you have messed with a bit around a bit and got both items.