I gave four stars but I haven’t actually used my new PureZone HEPA Air Purifier yet. Waiting until Spring when allergies hit. At the moment keeping my bedroom window cracked a bit seems to do the trick and keep fresh air circulating during the night albeit also keeps my heater working a bit more as well but we like to sleep pretty ‘cool’ so we’re keeping the heat low. The purifier came beautifully packaged and was promptly delivered. I have high hopes for this lovely little air purifier this Spring and Summer!