Most helpful critical review
Great at first but doesn't last
on April 3, 2015
I've purchased four of these. I love them for the brief period while they work. The sound quality is good. Although because they are digital, every few nights they seem to develop some kind of pattern where I can hear other loops of sound within the noise. It's very subtle but distracting. I love how portable they are and have used them with batteries while travelling. However, the life span has ranged from one year to a few months. After that, the volume control stops working and they just turn off overnight. I currently have two of them in my baby's room because one or the other stops working during the night. I won't buy again. There are more expensive but better units that use internal fans to generate white noise that are blissfully natural sounding.