Easy to set up and easy to know if it's working by it's light system. Very quiet, very effective. I use it in an art studio with lots of toxic fumes and bought the version with the Silver filter. It works great. Highly recommended (and I shopped a lot of air purifiers!)
Research all you want, read reviews, and you will come back to this airfilter. I plugged it in and it lives up to every promise. ITS SUPER QUIET, IT CLEANS THE AIR, AND YOU FEEL BETTER!
We bought the 45i for our bedroom. So far, I love it. I love the air quality sensor and the auto function. It feels good to know I'm breathing clean air while I sleep! I'm definitely waking up to less congestion.