Worth every penny.
My house has three bedrooms and they’re all close together. My kids wake up at night and come to my room, which wakes me up and can become a problem if it happens too much. I put this in the hallway between our rooms, and they sleep through the night.  It’s doing a great job of drowning out the noise and I also find the sound very soothing, so I run it in my room at night even when the kids are gone. I started to give it 4/5 instead of 5/5 because an option to increase or decrease the volume would be nice, but you can twist it to get different variations, and the air blowing through vents is a more natural sound than something you could control with a volume knob.
Rating: 5 stars