I've rarely been this torn about a product. It's an amazing portable AC unit that looks great, was easy to install and, most importantly to me, saves energy by using the DC motor. I want to love it but can't: the problem is the scorchingly high-pitched squeal it emits when running. I'm not sure if LG has a repair method or fix for it but it's to the point that the CIA may use it as part of their enhanced interrogation techniques. I don't think I have above average hearing but the drilling, whiny tone pokes holes through my brain. I did a fair bit of research and a number of websites listed this as the the best (or one of the best) units money could buy. I'm quite disappointed that an otherwise spectacular unit could be disappointing and, ultimately, unusable--at least for me. Then again, I could perhaps wear my noise-cancelling headphones in the house to mitigate the tone but then I wouldn't be able to hear much of anything at all.