I have been using it for couple days only. So far it good

Everything works but one of the ac adapters.

I went back and forth between a 3 and 4 rating. Pros: got two for generally decent price. Looks nice. Smaller/compact for tabletop or could stand on floor. Three speeds - level 1 is mute (which also means it doesn't seem to circulate much air). Lock button for kids/pets. Can turn off the blue lights that show speed level. Cons: Low is very low (says mute for a reason - doesn't circulate much). Medium is a bit loud. High is really loud. Good to have white noise, but not for TV watching, etc. Does it work? I am still not sure my feelings on how well purifiers work. It's basically a fan with a filter. If you have a small, not well cleaned area it might really make a difference. We personally haven't noticed a change in allergies, etc. I feel better turning this on if my kids friends are over (maybe at least helps circulate air/prevent some germ spreading?) We use the one in the bedroom overnight on low. Medium seems a little louder than a regular fan noise. I wish there was in between low and medium speeds. The other is in the family room which I turn on as needed. The filters seem easy to change and easy to purchase. Overall it's a good purchase.

Works well

Like the silent mode for night. It is a little loud on the other speed’s.

I’ve had these for a few weeks and they seem to be working well. I’m going to give it a little longer to be sure there doing the job.

This is a good purifier for the price and size. It has 3 options, low-high. We use it on medium and we keep it on most of the day. It gets rid of a lot of dust, I've opened up the bottom and looked at the filter and it does filter! However, it's pretty loud and it doesn't filter as much of the air as I'd like it to. I still feel stuffy and sometimes the air still irritates my lungs, but it's relatively cheap for an air purifier and it filters large dusts off the air. I'm not sure about filtering anything smaller than dust particles though