This air purifier is so great, it exceeded my expectations! First, I was surprised by how quiet it operates.  You can't even tell that it's on most of the time. I love to have it working in my office and not interrupt the sound quality of phone calls or video calls. Secondly, the ability to use the app to control the functions is great. If I accidentally leave it on after I've left the office, I can easily switch it off on my phone. Changing out the filters is super easy too - just pull it out and drop another inside. I would highly recommend this air purifier for any space