Pros: Seems to be working well.

Cons: Not sure what to do when permanent filter needs to be cleaned.

Pros: It took several days to make a big difference in my studio apartment but it is 600 square feet, which is much more than this filter is rated for. I run it at 100% while I'm gone for the day and on silent mode when I'm home and after about a week the filter was noticeably gray. I certainly didn't want whatever that stuff is in my air. My allergies have subsided a lot as well and my apartment smells better. I was surprised at how effective this is. Everyone should have one!

I can't wait to see how effective it is in the worst allergy times of the year.

Cons: The high speed mode is insanely loud. I actually wondered if it would bother my neighbors at my apartment through the wall or door because you can certainly hear it.

Other Thoughts: Really nice for the price!

Pros: Nice purifiers that dont require new filters monthly

Cons: none yet

Pros: Permanent filter and I don't need to buy filter to replace.

Cons: A little noisy.

Pros: when the sun shines through the window onto the floor, i can't see a single dust spec in the sunbeam when this filter is on low. it's been a great help in my basement.

Cons: none

Pros: Wife and I needed a HEPA filter that would fit under our bed because the dust bunnies were appearing weekly and were huge. The filter has three settings and does an excellent job filtering so far. I usually have it set to Med during the day and Low "silent" at night. Great product.

Cons: Plastic is quite malleable but seems durable none the less.

Pros: This is the best air purifier available (for the money), I't quite, easy to clean, and great quality material, I've been using mine for 2 years straight non-stop (except when cleaning). I'm allergic to dust (I think everyone is), and pollen, my morning alarm used to be a sneeze, follow by another sneeze... Those days are now over.

I would highly recommend it to everyone, if you do get this exact model make sure you get the additional filters (which were actually made for the newer version but works fine on this one).

Cons: None...

Other Thoughts: You can add additional Carbon Filter upfront to help reduce dust particles to get through, for an additional $7.00 a box (which will last for about 2 years), makes a huge difference.

Pros: Able to stand it up or lay it on its side, depending on space availability. Runs pretty quite, unless turned up high (expected). Moves a decent amount of air to be so small.

Cons: none

Other Thoughts: Definitely a one bedroom purifier.

Pros: Exactly what we need. This little eat 2 teaspoon dust(only) quietly at whisper clean mode every 2 weeks at New York City. easy clean, and Yes, It couldn't decrease our spring allergy symptom at all but absolutely can tell the difference of dust decrease over the table\TV\computer or in air.

Cons: PRICE!
$80-$0.02 is far far away from its manufacture+transfer+selling cost. $80 is the manufacturing cost of a HP Touchpad, not this small tube with some plastic shell, a cloth base filter and a tiny motor. We got two of these in half price at BF, but even with that half price, we still think it is over price.

Other Thoughts: give it 5 eggs, cause we wish it could be continue output, we might return to buy more when our old one died, but only until we found other replacements if they don't drop their price.

BTW, it need a handle. we have to hold it with two hands like holding a baby when moving it. Mostly my son hold it with his one foot.

Pros: Works like it is supposed to. Sort of a large vacuum that sucks up dust and what not all day long. I felt results the next morning, I am less stuffy than I usually am in the mornings.

Cons: Loud on high, noise is significantly lower on medium. I don't mind the noise so not enough to subtract an egg.

Other Thoughts: I clean this thing out about once every week. There is always a considerable amount of dust in the filter. I prefer it not having an ionizer, no ozone smell for me, thanks!