I've had this product since 2015, maybe longer, and it has always stayed in my large master bedroom...the last two years in a row I suddenly felt like crap when I woke up and had terrible fatigue and allergy symptoms all day. Last year when it happened, I kept saying, "why all of a sudden do I feel so bad?!" Then my subconscious remembered seeing the blinking light on my purifier...so I thought, "Could it BE?" I ordered the replacement and felt better.
Now here we are a little over a year later...I started waking up feeling unrested and headachy/sneezing all day again. (Mind you, my cleaning people had just been here and so there were some chemicals floating around but this is a monthly occurrence so that should not be the issue.) It finally hit me (quicker this time because of memory banks) that the light has been blinking on the unit again. I ordered a new reaction chamber from Amazon immediately. I can't wait to receive it and get relief.
I was always on the fence about whether this thing is actually doing what it claims and now after 2 years of experiencing the same, I am convinced this really does its job. Sidenote: I also had been noticing my house smelling kind of musty upstairs but hadn't put two and two together.
Some say it's "loud" and that may be somewhat true but it's kind of a useful white noise for me. Another thing I noticed in the past is if the power had gone off in the house and I didn't realize the unit was off, I wasn't able to fall asleep...I think it was from the sound being off (it was too quiet!!) and possibly from the air not being clean.
I wanted to put this review out to the world because I do feel like I've had a long enough period of time to really judge this product in an unbiased way. It's pricey but I worth it to me because allergies suck and this clearly helps!
Bottom Line: Yes, I would recommend this to a friend