They work!
I bought a 5 pack. The bags were big!  I put one in each of our 3 bedrooms, 1 in the formal living room and 1 in the den. These are large rooms. After 2 days I can notice the air in the whole house smells fresh and clean. I love them. Will get some smaller ones for the bathrooms, closets, cupboards, and vehicles.
Rating: 5 stars