Works as advertised to help sleep
Yes, this little machine has definitely improved my sleep almost from day one. I read another review that stated that you can hear a motor hum in addition to the "white noise" sound - it is true. So, I use the machine on full sound loudness, which drowns out the motor hum.  Someone who wants a quieter white noise might have to put up with the motor hum, but some might not find that sound objectionable ... All in all, I am pleased with the product.
Rating: 4 stars