Great item, was reading reviews over a few large stores in Australia, and decided to purchase this from JB-HiFi in store. Living in a rented apartment with built-in carpets which we normally do not prefer as it harbors too much dust & germs etc. After purchasing this for the 20sqm room, my lvl 4 dust allergy found a relieve as I do not cough or wake up in the morning at 4am coughing due to irritation, for the past 4months i'm finally getting better quality sleeps. The sound is great for this Z-1000series, not loud, comfortable sound, suitable for light sleepers for sure! Not sure what the 2000/3000series will sound like. But im heading in to purchase a bigger one right now for my living room. Do expect to change the filter every 4-5months. Auto detects will let you know when to change the filters. Make sure you have extra filters in your storage as their filters are not sold in store, and you might have to wait for abit longer for postage in times as such. Hope this review helps!