The first thing that caught my attention to this item was the price. The value was great & worth every penny. I bought this when I moved into my new apartment over a month ago to help w/ the paint fumes & also for my allergies which have been getting worse as I get older. I have one unit in my bedroom & the other in the living room. It is a little bulky, but light enough to move around to other areas. So far I haven't had to dust as often as I have in other places I've lived. The ticking noise made me nervous @ first because I didn't know why it kept making that sound (until after I read the manual), but I got used to it & because I have the Ionizer on almost all the time, it's not quite as loud or frequent. I bought another set for my office because my office mate is from a culture that does not practice the use of deodorant. I haven't had it long enough to test if it works on those type of odors, but thought it might help some. I also liked the other review betters on this item than on other items in this category.