My husband is a best selling author and works daily on his computer writing books. He has some allergies, so this unlike many air systems we purchased over the year is most effective in cleaning the air. He would get congestion at night and the first night we started the unit, he and I noticed he was not congested. Great tech and we will be buying a second one this spring when the pollen flies.
Too early to know if it has earned 5 stars. I purchased both 45i and 75i units. Have been in use for a few weeks and am pleased that they are so quiet. The house feels fresher when I walk in to it. Was easy to set up. Filters are easy to install. Control panel easy to operate. It is nice that you can turn the lights on the panels off. The units also look nice.