Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It's kind if loud.

I have only owned this purifier for a little over a month. It works very well with tremendous amount of airflow and does what it advertise's. The HEPA filter is a comfort. It is a little loud though.... for that amount of airflow, I can't complain. It remove's odors quite satisfactorally! No complaint's here.