I got this air cleaner as something to use in my son's bedroom when he was an infant. While it worked fine for a while, we found that long-term, it really didn't hold up and we eventually had to replace it with a new type of air filter. It was a little frustrating that we had to replace it, but thankfully it was not too expensive to begin with and we did yet almost a year's worth of constant use out of it, so I didn't feel too much like it was a complete loss. Ease of Maintenance I found that I had to check on it a lot to make sure it didn't need maintenance, and it would go from being perfectly fine to needing several things taken care of all at once. Dust/Allergen Removal It does do a really nice job of taking care of the dust and allergens in the room. My son's room was fairly small, so I'm not sure how well it would work in a large room, but I was satisfied with this. Filter Availability I had to hunt around a bit and eventually just gave up and ordered them online. Durability It ended up calling it quits after a year.