Got em yesterday to replace well worn filter that came with the filter. My allergies were going off, and I needed to replace the filter immediately.Unlike the reviews on other knock offs, this one fits the purifier perfectly, and looks identical to the original. It began working and my allergies started to get better within the day. Only time will tell if this one is as good as the original in terms of durability and cleaning, but it seems to be working just fine for now. If I can’t vaccum cleanSee full review