I ordered five and got five free for a total of ten, at a cost of over $100.00. I am so very disappointed in this product. We have pets in our home and thought that it would take away the stale odor that comes from dogs. Just a plain dog smell. With two dogs you would think that would work for that. Not. Then I put one in my car to remove the smoke odor, and that was an epic fail as well. The basement musty smell didn't work either. My question is, what kind of odors do they work on since I have tried three different kinds with no luck.
I am so disappointed in this product that I would never recommend it to anyone.
Bottom Line: No, I would not recommend this to a friend