I wanted to let you know how happy I am with my two new PureZone™ Elite 4-in-1 True HEPA Air Purifiers. It is my first time purchasing air purifiers, and I choose yours due to the excellent customer reviews. I, too, find I am pretty satisfied with my air purifiers; they are excellent quality and quiet while trying to sleep. The purifiers are also of excellent quality for the value and so many speeds and feature ION and UV. I purchased one for my office since I work from home and one for the bedroom; the timer feature helps at the start of my work day, and when I sleep at night, I put the 8 hours on and don't have to worry about it during the day. Thank you for making such a great product.