I received this product for free in exchange for my honest opinion. After doing research on air purifiers and how to determine if they are likely to actually increase pollution levels by generating ozone (Electrical vs Mechanical) I would not purchase this produce. That being said it is relatively compact, can be used vertically or horizontally, and had made the air in my home office smell better. It is a bit louder than I would like, but not any noisier than a fan. It has not improved my vasomotor rhinitis symptoms.