I bought refurbished Blueair for my art studio a month ago and I really liked it. It worked great, had good warranty, the customer service was super nice - so I decided to buy one for my boyfriend, as a gift for his birthday.
I liked the look of black color, which matched his house, and his allergy symptoms got reduced, I was very pleased to hear that.
We both joined the filter's club, and start living with Blueair. (In some reason, we both called it "she" or "her." )
I bought it just a month ago and love the sensor feature that it has. I can feel a difference in the air quality but wish it had more filters then just one. I love the fact that it is made of sturdy metal and not cheap plastic. Love the remote and the display.