Product review (3 stars): Pretty good. Just ok. NOT as good as genuine Vornado filters.
Good but not great.

Because these are so darn cheap, I really tried to like them a lot more. But these are definitely inferior quality. When compared to the genuine Vornado filters, these dry out more easily, these are more flimsy when wet, and these do not last as long. After 4-5 weeks, these start to fall apart, whereas the Vornado ones typically lasted 8-10 weeks.

It is very dry in southern California, so we have these running 24/7 during the "winter" months (from December to April). Unless we go out of town, our humidifier is running all day everyday. Also part of being in southern California means so much dust in the air. Plus we have 2 labrador retrievers who shed constantly. Put it all together, we need to change our filters often.

I use these with the Vornado EVAP40 (which we LOVE) which is on the compatibility list (MD1-0002). Maybe these will work better on other machines?