I got this air purifier because I have Asthma and severe allergies and I have a lot of trouble sleeping at night because my nose clogs up. I thought I would try this and see it it helps and I'm glad I did. This purifier was easy to put together, just take out the filter and take off the plastic then put it back in and its ready to go! It has several setting I keep mine on high because the indicator light was glowing red which means a lot of not good stuff in the air, it changed to an orange color after that and has stayed steady there but I have been able to sleep at night and no clogged nose so its working great for me! It also has a button to shut off the light so you dont have to see it at night but I like mine as a night light! Great find!