I live in a traditional style dorm housed in a very old building (with all associated problems that come with age: dust, build-up, mold, etc.). For the first few weeks of school I was having nearly constant sneezing, sore throats, and watery eyes, coupled with ongoing problems with my ears, it was miserable. Finally, I decided to buy this air purifier and wow, what a difference it made. As suggested, I ran it on two or three for the first couple of days to let it catch up and then constantly on one or two throughout the semester. I was blown away. I used to have to dust every other day just to keep the film from building up, now it's once every week and a half, I switched to the 'high pollution' filter when they started doing construction outside with heavy machinery and smog. I can't recommend this product enough, it really cuts down on the allergens, discomfort, and overall abysmal quality of the air in my old building.Later, I moved to a very dusty (desert climate) state and have noticed that my room has accumulated significantly less dirt and grime than my roommates. Seriously, if you're considering buying, just do it already, I have no regrets.PS: I don't use the timer function because I leave it on all the time, however, it does work effectively when needed.
Rating: [5 of 5 Stars!]