I've owned this unit for less than a day and I'm already sending it back. It stopped working after about five minutes and will not power back on. Save your money.

You have to use this at the lowest setting in order for it to be "quiet".Our son's allergy problems are better with this in place - even being used at the lowest setting.

First, it's a pain the rear to clean the black filter. It's not "hard", it's just a pain. We have two Honeywell Purifiers, this one, and a smaller one for our boys' bedroom. Neither seems to do anything to improve the air quality. Both boys suffer from allergies, and there is no difference with their unit. My husband and I haven't noticed a difference at all with this unit in our large bedroom.We turn it on "high" at night, and it's basically our sound machine. I had such high hopes after all of the great reviews, but it didn't change much for us at all. Wish it had. We also have Sharper Image Ionic Air Cleaning machine, and I've had that for over 10 years, and it STILL works better than this. We use that for our downstairs area, and we're looking for more of that type now.

This purifier definitely does what it's supposed to do. The filter is designed for big rooms, and it's more than needed for my studio apartment, which is about 450sq ft. However, I find that leaving it on low power doesn't have much of an effect. There's still dust that settles on surfaces around the filter. I usually leave it on medium or high during the day and switch to low at night.

I ordered this Honeywell air filter twice, the second time hoping it was a one time defect. The first time I received the unit the "High" option did not work, the same day it came! I did a return to Amazon and they sent me a replacement, and the replacement had the same problem... after using "High" once it never worked again. Brand new the "High" worked once on both of these units.Will not buy again. Search for a better unit, I won't even bother with a review on how loud this thing is or any other features, it just is not worth it.Believe the negative reviews on this thing!

I was happy initial because I don't have to change the filter on Honeywell and is cheaper than Rabbit Air BioGS. I can't stand the noise level even at lowest.I can not work on computer and have it ON. It's good only if you are not in the room.I got 2 years ago "Rabbit Air BioGS" - that is very quiet, I could sleep when is turned ON - you can not hear at all, but Rabbit is very expensive over $300 and I paid $55 for a new filter that you have to replace every 18 month. If you intend to stay in the room when is ON - forget about Honeywell. The manufacture and/or amazon should say what is the noise level.