I've had this machine almost eight months, I do find that I have to clean the filter a couple of times a month rather than once a month but that may be because I live in the city. Even so, this is a lot cheaper than replacing filters every two weeks and it is extraordinarily easy to clean the filter for this Honeywell purifier. It does seem to have helped with my daughter's severe allergies, though not entirely alleviated her discomfort. However, given that my daughter's allergies can incapacitate her or send her to the doctor, this is still an amazing change. A person with regular allergies might have an even better result.

This is a great air purifier. It is very quiet, and it doubles as an oscillating fan which is nice. Since we set up the purifier in our bedroom, my husband has had fewer problems with his asthma during the night.

Had this on my Amazon wish list, but then came across it for the same price at a Target store and bought it (sorry Amazon). And I really am pleased so far. My toddler has allergies and his allergist had recommended an air purifier for his room. We did lots of research in looking for the right one that was still affordable. I really like that this one has washable filters. Lots of $$$ savings there. Since getting this, my son has had fewer runny noses and no severe allergy symptons. We've even been able to drop two of his three allergy meds - - not sure yet though if this is due to the seasons, or perhaps we were possibly over-medicating him before, or if this thing really does work that kind of miracle. Either way, fewer snotty noses makes me happy. In regard to the concerns over noise, this one is fairly quiet. I keep it on low pretty much all the time and it is hardly noticeable. My son has no problem sleeping with it running in the same room. The oscillating feature is nice and it has a small nightlight on it that comes in handy. I would definitely recommend the Honeywell HFD 120.