I purchased the Blueair 411 for my dad as he has a smokers smell from the flat above. I did try it, it works well, simple to operate, one centre touch button to control the three speeds. My dad reports that it does help with his smoke smell problem, the air is a lot better when the purifier is running.

Very quiet on the one bar setting simple to use just take out of the box and plug in, a very reasonable price compared to other similar products, which I felt best to try and see if it helped with allergies.

Really lightweight, so quiet on the lowest setting so ideal for having on overnight. Medium setting makes a fair noise but it sort of becomes a white noise, and bonus drowns out other external noises a bit! Room just feels a bit fresher from having used it even from the first day

After reading lots of reviews for air purifiers to help with my husband's hay fever we opted for this one. Really pleased so far - good size, silent, easy to use & noticed a difference in the air quality. We have it running in our room 24/7 and time will tell if it can combat the tree pollen later this month!

I would normally sleep with a fan on for the noise but decided to go with this since I’m allergic to dogs it would clean the air also. Must say that the product is fantastic and works great, the only drawback is it has 3 speed settings, so for sleeping it’s silent or crazy loud. Otherwise great

Really good purifier, had issues sleeping prior to buying this device. Also really quiet which is great because you can leave it on during the night.

Really pleased with this air purifier. It seems to be having a positive effect controlling Dust from when I clean our log burner. ( no static dust on tv!) Also We have a German shepherd who sheds a lot. Since using this Blueair purifier I have noticed a great reduction in ‘dog hair ‘tumbleweed’ and when I vacuum my dust canister is no where near as full as before ...I can only assume he is keeping cooler??) I take it upstairs at night and sleep well with ‘ fresher air’too.

This is a good product. (Second one I've purchased - this one for a relative.) Does the job making a noticeable difference to air quality. Can be left on overnight in the bedroom as on the lower setting it's whisper quiet. The filter replacements are also half the price of many others. No regrets at splashing out on this despite initial skepticism.