Helpful to a light sleeper for side-location noise or outdoor noise. Does not work for overhead noise.
I read a lot of reviews on this one before deciding on it. So far, several months in, it really helps with apartment noise to the side of me. However, it does not help with above noise (people walking above me in thin-walled/ceiling apartments). Great value and easily adjusted to the tone/volume. Helps me sleep well if the neighbor upstairs is not home. If he is, I need ear plugs as well... :/
Rating: 4 stars