Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sleep Mate

I don't understand how people are saying that it isn't loud enough! Mine is so loud that I keep it in my bathroom (in the master bedroom) at medium speed. Sometimes I crack the door and sometimes leave it open, depending on the situation of the noise makers. I also take it to hotels with me and couldn't even detect the party goers next door. I can't get a good night sleep without it !