Instruct: Classify Amazon reviews into positive or negative sentiment
Query: VERY LOUD!!!

I bought this for my baby boy because he is allergic. The filter seemed to make a difference in the air of the room but it's sooo loud that I couldn't run it during the night. I had to return it, because the idea is to run it at nigh and all day while he sleeps.So if you are looking to buy it for a room that you actually sleep in. DON'T BUY IT!