Two defective units in two months; but it works okay now.
I ordered one of these units at the end of December.  I loved the white noise it created but within three weeks it started making a rattling sound that woke me up in the night.  I returned to Amazon for a replacement.  I got the replacement at the end of January.  Five weeks later, the replacement started making the same rattling sound.  Now I am past the 30 day exchange period and am stuck having to pay to send it to the company for repairs.  I really do think the sound it creates is great for sleeping (no, not loud enough to cover other loud noises).  But the quality is really lacking.<br /><br />Edit: I was able to find a work around for the second defective unit. If I propped it up on an angle, the rattling stopped. It is now 2016 and I still have it and use it every night. So, it worked out in the end.
Rating: 4 stars