I just received my third Alen. I have them all over my apartment. The small one in my bedroom is working great and sucking up lots of dust. Their shipping is outstanding. I get my orders in 3 days and they ship within a couple hours after I place my order. They are all very quiet, even the dog doesn’t mind. Absolutely love the ionizing feature that makes the air smell fresh. I Love how you can customize them with other filters and colored panels to match your room. Would recommend this to anyone.