You are considering whether to buy a product. You look at the reviews. Would the following review decrease or increase the chances of you buying the product?
Review title: Not sure if they work
Product review: My vents were bigger than the filters so I had to use two of them, side by side. I did not notice a difference in the amount of dust and other particles in my room. The filters also blocks some of the air from the AC/heater which affects the temperature in my room.
