The windmill ac is quiet (whisper quiet!). It looks great and operates smoothly. I had a little trouble with the unit on delivery. The compressor was a little loud. So customer service helped replace it really quickly; it happened again, but they replaced it again and gave me some perks as a consolation. I’m confident the issue was in the shipment not the units itself, but the team at Windmill was super supportive and quick to help. Love the units we have and so happy at how quiet they are.