I was sent a Shark US - Shark Air Purifier with True HEPA from the TryIt Sampling Community to use and review. I've never had a purifier before so I have nothing to compare it to. I have heard good things about them and I know Shark makes great products. This unit was super easy to set up, very user friendly. I has a large digital display that tells you how clean your air is. Particles, dust, allergens, viruses, smoke, odors are all taken care of which has greatly lessened my allergies and breathing. I will continue to use it to see if it works just as well months down the line. I'm also curious to see how long the filter actually lasts. Until I'd see any functionality problems or other issues, I'm giving it a five but totally recommend it.