Limited, but still useful
After buying this I found out that ionisers not only do not remove particulate matter, but they give off Ozone as well. That's my own fault for not checking properly, but surprisingly, despite all that, this is actually quite a decent product. It needs to be used sparingly, and preferably when there is no one in the room, but there's no doubt whatsoever that the negative ions do their job and freshen up a room in reasonably quick time. If you're looking for a filter, this is not the product for you. If you just want something non-gaseous and non-perfumed to freshen up a room, this will do the job very well.
Verified purchase: YesCondition: New