Bought it about a month ago, it actually works! Is great for any "off" smells around the home, those stale smells, and any outdoor pollutants like smoke. I haven't got my first electric bill yet, as keep it on all the time, might be scary. There is a big jump in settings from virtually quiet to quite loud on second lowest setting, and led lights on the display very bright. Otherwise is great.

We bought this specifically to help with the dog smells in our living room and it works perfectly! Only have it on for an hour or so a day.

I bought this purifier as a last resort before putting my 7 year old through 5 years of allergy injections. He is allergic to dust and dust mites. We have the best dust mite bed and pillow covers, I dust and vacuum every couple of days, wash his bedding in allergy washing powder once a week, antihistamines, etc, etc, etc but he continued to suffer so badly with allergies at night. His symptoms were horrible, he was miserable and destressed every morning before school. I purchased this purifier hoping for the best but not expecting anything. Within 1 week I had my cheerful, happy boy back !!! I can even see it's working as not as much dust settles onto furniture, so that is always welcome. I would highly recommend this product.