This is my 2nd one, and I'll always buy the product if I have to replace it. It has a very calming sound, not the irritating noise that some of them make, and it is adjustable for the type of noise you want. You can turn the top of the machine to muffle the sound a bit, or twist it to get full noise. It's great, and apparently used in many mental health therapist offices. Very soothing.
Rating: [5 of 5 Stars!]