People get so caught up in themselves when they are asked to review something on the Internet. Well let's avoid that here. Plain and simple, this is a great app with loads of sound options to meet your personal preferences. Shelter has been putting me to sleep for over a year, while Indigo Rain has been putting my friends newborn to sleep for 4 months now. So you could say it's kid tested and mother approved. Haven't even needed any of the fade in/out options. Just turn it on and goodnight.