Wonderful app with great sense of space and sound! My kids love the sound and prefer this app to music at the end of the day. The highest praise I can give it is this: My family has a summer house on the Midcoast of Maine, right on the ocean. The sound of the waves on the beach through my open window at night is one of my favorite sounds from childhood, and last summer we had a stretch of bathtub-calm weather with absolutely NO surf at night. It was just too quiet. I set the sleep timer and picked the kids' favorite ocean track... and we slept like babies, our brains convinced that all was as it should be, ocean and all. Love it!