This new model is made of plastic where as the older model had a metal casing. That said, unit is lighter but still well made. Functions very quiet unless it's at high speed. We use it in bedroom at auto mode thru the night. My child has allergy and sleeps much better with this unit on. The unit came within a week with filters already in place. Just plug in and let it run. Very satisfied after waiting a year for this new model to come on market. We got the larger power unit since it's not a big price different. We still have the old Rabbit Air model unit for the living room into our fourth year and running great with three cats. Thanks.
Excellent quality materials, very cool look, the price is my only complaint so far. It is super quiet and doesn't take up too much space. The very first night I felt that it helped me to breathe easier. I am allergic and suffer for the most of the year from sneezing and runny nose - I really see the difference once I plugged in my rabbit. My allergies didn't go away completely but at least I don't wake up every two hours. I would recommend this product to allergy sufferers and people with pets.
With the Rabbit Air Purifier in our bedroom I wake in the morning without the usual stuffiness in my nose. I haven't done that in years! My husband's only request was that it be QUIET. It is! The only unexpected thing is it's white-light glow throughout the night. It isn't unpleasant and doesn't keep me awake, but if you are super-sensitive to light in a dark room you might want to investigate.