Top critical review
Waste of money since doesn't do what it claims to do
9 February 2019
We bought this product after suffering allergies from dust as a new road is being constructed next to our house. But I don't seriously think this works as advertised. The PM 2.5 reading shown on the device jumps from 50 to 450 and again back to 40-60 range in a matter of minutes. I don't think that's possible, given that this is running indoor in the bedroom.
So I decided to return the product.
I am also quite displeased with Amazon's changes in return policies. While the product is clearly marked as "Returnable", they kept disputing my issue and without any justification, claimed that if the reading is changing, there must be changes in the PM level. After I insisted they agreed for replacement and then refund. I am a long standing customer, with a very little history of returns/refunds. I am also a long standing admirer of Amazon's customer support. So it was a bit of a shocker to me. Nevertheless they agreed at the end. So my irritation has gone down a bit.