When buying this air purifier, I didn't think it was going to magically get rid of my allergies, and it didn't, but it definitely helps everyday and makes a real difference! I can go to bed and sleep my nights through without having to stuffed or runny nose. I let it run for a couple hours on the allergen mode before bed, and then I set it for 8 hours on general clean during the night. You can dim the lights and remove them. The noise isn't loud nor bothering.. my a/c is louder on its own. Also, the air purifier acts like a fan and always keeps the air fresh in the bedroom, which I really like. Apart from that the product is quite big, but not very heavy, so you can move it around if you wish, though I don't think it is made to be moved around.