The auto feature is great and I’m glad I bought this version instead of the original. It’s quiet for the most part, but can get noisy on higher settings—nothing to be considered about. Unsure if it helps with odors or not—it’s just hard to tell. For whatever reason I didn’t receive a different color option for the outside cover, so I’m stuck with the grey, which was disappointing. Despite it all, I can’t imagine a better air purifier at this price point, so I’m satisfied.