We have used this white noise machine since our daughter was born. She's 2.5 years old now and still uses it. She is a LIGHT sleeper and we have had issues, but I know if we didn't have this drowning out neighboring noises (think barking dogs, car alarms, bbqs, etc.) we would be way worse off. We're currently expecting another baby and we'll be ordering a second one STAT so we are prepared when she comes home from the hospital!