Do you feel the different in air quality? Or you use it because you have baby, perhaps.
I'm just using fan in living room and aircon in bedroom. Interested to try but wife not really convince and worry will be white elephant later.
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I am still using the entry level one and I bought it for my 2 girls. I felt that it does help. Furthermore I dun use it frequently, mostly during haze seasons and certainly felt easier to breathe.
If you want to try it out, you can get the entry level one lor. I think it is good to have 1 at home.

or they know ppl will buy their stuff regardless cause lack of competitors online in singapore.