Love it!!! Shipping took awhile buy that was because of the postal service NOT Sans. I've noticed a big difference in my home. Tons less dust and with one big golden retriever, three flemish giant rabbits, two ring neck doves and three canaries and, of course, two grown sons.....this house is. big and busy and there's lots of things floating in our air. We use oil for heat and if the Pennsylvania winters get much colder, we're going back to our wood stove in the living room. We used it solely when we moved in 30 years ago but have enjoyed warmer winters for a few years and wood is lots of work. But we're in the freeze zone now and much colder, we're going back to wood. However, the dust, dander, feathers and allergies are all doing well. Thanks to Sans!! Anxious to see how long the filters work.