This product works amazing! I ended up buying another one for my mom. The ocean and the rain are my favorites. I hate the night sounds (I live in Alaska, hearing crickets is just a strange and annoying NOISE) The rain had a clicking noise every now and again but after using it for a bit when we tried the rain again the noise was gone so it must have been from sitting. My mom's used it so much already I don't know how it's worn out. There are no problems other customers had. Though I imagine with enough constant use I will have problems with it (as expected from everything from cell phones to bedding, nothing lasts forever) Don't let the complainers scare you away because that's all their reviews are- complaints because things don't last forever. :) I think everyone should buy one or two!