I read the reviews and I was skeptical. I bought it and decided to give it a try. Absolutely satisfied and very impressed with the results. I have a pet that is inside and outside. I also run a wood stove. I was having to sweep everyday, dust everyday. It was a disaster and I was looking for a solution. I now sweep and dust weekly, and I am not having the issues I was having before my purchase. I do keep check on my filter and make sure it stays clean. Results were noticed in less than1 week. I highly recommend this product with the filter for pet odors, smoke and pet dander. I was amazed at the difference! I think you will be too.