I bought this in the heat of summer to ease the burden on my trailer's older AC unit and it has been just great. My old AC had been performing badly and has since broke down. In the meantime this portable AC has been sufficient to keep it cool in here. It is not summer but I am as far south in Florida as you can go so I use AC year round. I will be repairing or replacing the old AC before it gets really hot again as this portable is not recommended as enough to cool the entire space. I am very satisfied with this product. Some have complained about noise in these reviews but I haven't found it to be noisy at all. When it shuts of and on because of temp changes it does have some humming sounds as to be expected. It does not interfere with watching TV or conversation or sleep so I didn't get what they are complaining about. Perhaps their units were damaged or something.