I bought the PureZone HEPA Air Purifier as I suffer from allergies and live in an older building. When the unit arrived, it was packaged in an attractive box and was easy to unbox. It was very easy to put the filter in the air purifier and then turn it on so that it could start working. The unit has three different settings/speeds, and while the first two are nearly silent in operation, the third level is noticeably noisier. I usually keep it on either one or two for my needs. The air purifier is also sleek and modern looking and is unobtrusive in my room. I use it near my desk, since that's where I spend a lot of time. I feel like the air is a lot cleaner since using it and I run the machine 24/7 without a problem. Overall, it's a great unit that purifies the air and I would recommend it to anyone who is looking for a great air purifier for their home.