Just received the air conditioner, it was a quick set up and it actually cools very well. But the problem with the air conditioner is that it makes a loud rattling noise and vibrates strongly when in the cooling mode (when the compressor starts) which is unbearable. Searched the internet but did not find similar experiences. Wondering if the particular unit I received is defective or if something happened during the delivery! it would be great to know if others having the same problem. Seems like a nice air conditioner but the noise makes it unusable. Thinking of returning it!