It's costly & hard to find replacement filters on other air purifiers. This Shark has a permanent air filter which monitors the air quality automatically & works quickly & efficiently. There are various settings including an auto mode which monitors the air quality & increases automatically to maintain a good air quality range. This is an excellent buy if sold for under $300 as smaller, less efficient purifiers that need replacement filters sell for more than $300.

3 stars for misleading product name. While it is a great air filter and deodorizer you will need to eventually replace the main filter cylinder. There are washable screens the air passes through that help extent the life of the main filter. Depending on how dirty your local air is will effect when you replace the filter.

Works Great! The odor neutralizer was very strong when first inserted, so since unit was used for a sensitive person with lots of allergies we removed that. Like so much purchased a second one! The fact that the numbers dropped so much when popcorn was popped in a bag in microwave, and when bacon was cooked dropped down to zero. It was eye opening! Sooo quiet, super easy to use, and sleek looking!

I got this a few weeks ago to help with issues we have with some smoke from our pellet stove on startup or if food gets over cooked to preclude the smoke alarms going off.. It seems to be ok but we still have a smell so it doesnt get all smells out of air.. Maybe it will work better with allergens or pet hair but for smoke smells of pretty much any type its not that great to us.We cant use automatic because it never speeds up enough to do any good. It always seems to show good air quality, so we have to use manual 95% of the time. So by using manual on higher speeds, we will have to replace the filter far sooner than claimed on videos or manuals. Be aware of that.

Smelled like melting plastic

Good at circulating air but not efficient with food smells from cooking

Very pleased with shark, cleans the air and easy to breathe

I got this few days ago and I like it so. Now my other one is not working.l

Man, this machine is amazing! Wanna go over there?

This is my second one for my home! Love this, helps tackle the "pet smell"