I was waking up each morning with a slight headache and feeling stuffy. After researching various air purifiers, I purchased the Alen BreatheSmart 45i. I love it. It looks great and it really works to clear the air of the dust and other allergens that were causing my sinus related issues. It was also very easy to set up and it's really light weight, making it easy to move. On a scale of 1-10, I'd give it a 10.