Summary: This air conditioner is very efficient. Even with running it almost 24/7 our energy bill did not increase, it only used about 150 kilowatts in a month. Simple push button controls make it very easy to use. Also, the company that ships these on Amazon was very fast, we received ours within 5 days.
Summary: I use this AC to cool my bedroom that's about 225 sq. ft. The manufacturer claims this unit is capable of cooling easily upto 250 sq. ft. I've been using this AC for a week. The air it puts out is definately cool but this AC cannot cool the room more than 2-3 degrees, yes, farenheit. It cools the room by a couple degrees in the first hour, after that I can't see any difference whether the AC is on or not.
Summary: I bought this last summer to use in a new home I purchased that has no air conditioning. It was crappy then it's crappy now. Tonight I had it going full blast and it said the ambient air temperature is between 76-78. The out door temperature is 81 or so. It has no use during the daytime heat so I don't even bother turning it on and luckily I'm out of the house. It's so loud it reminds me of those god awful noisy air conditioners in hotel rooms.
Summary: It gets the job done, but its pretty big. The two fan speeds put out super noise, so I'm going to have to return it, I'm just trying to cool an avg size room, so this one just won't work for me. It does do a great job at putting out cold air, so if you got a big room and can take the noise, you won't be sorry....