Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best For The Money!

I'm a shopper who likes to do lots of research. Based on the features, I determined this unit to be the best for the money if it actually worked as advertised. To my pleasant surprise, the self adjusting fan speed works better than I expected. It really does sense an increase in air contaminants (I experimented) & the filters are priced a little lower than the average air purifier. It's not the quietest unit but it moves significant amounts of air & the "white noise" is soon barely noticed. I highly recommend this model.