This is my first HEPA Filter and I bought it due to extremely bad allergies and because my dog is shedding his winter coat. One word to describe this filter... AMAZING. This unit is worth every penny, when I was searching online, I bought this because the unit looked very sleek, looked modern, and was a nice shiny white to match my furniture. It's as functional as it is pretty. What's best, is in setting 1 and 2, it's nearly completely silent but still gives out quite a bit of clean air. The third setting is like turbo mode, you get a ton more air, but also comes more sound (expected). But what's more important is that it actually works. Last week I felt like I was going to die from the sneezing from all the fur, dust, and pollen in the air, but after about a day of use and setting it on a regular interval, the sneezing went away... completely... If you have indoor allergies, this is your buy...