I purchased two of the Dreamcentre sleep machines. One for my 92 year old mother (when she stays over with me) and the other for my 13 year old grandson who has ASD. I am pleased with both purchases. My mother was wary at first, but enjoyed a full night's sleep (at my home) the first time it was used. When she is not with me, the machine has been whisked into my son's room and he and his partner use it as part of their sleep routine. The longest setting means that the machine can stay on for most of the night. My grandson's sleep has also improved. He enjoys the musical and nature settings. I am very pleased with my purchases.