The unit works fine. It really helps cool my vaulted bedroom even just on eco mode. I like the app so I can see power usage and change the settings while I'm not near it. But it makes a lot of noise, and some odd sounds turning on and off. Compressor can be loud, the blower too. I don't think it sounds much different than a regular window AC, but I like it doesn't take up my whole window. It is HEAVY. Definitely need 2 people. I'm glad I finally got one to help supplement the AC that doesn't reach to the other side of the house upstairs.  4 stars because of the noises and the weight.