Instruct: Classify Amazon reviews into positive or negative sentiment
Query: They are working

The items I ordered are actually working. I can feel it moves air when I put my hand near its outlet. It is complete silent or quieter than florescent light bulb. It gives a smell close to a water fall in forests(Is that defined as fresh?). It is definitely good for a bathroom sized room possibly a larger room. In my opinion they are worth $15, but at the original price $79 I would not buy.