I've had the Dyson Purifier Cool Formaldehyde for a few weeks now and the first impression is very positive. The device comes almost ready for use out of the box, you only have to click in the filters yourself, you do not need the manual for that. Setting up the Dyson App was also quick and easy and once turned on, the air quality in my living room was immediately analyzed.
In auto mode, the Dyson itself constantly monitors the air quality and turns on (or at a higher volume if it is already on) when it detects polluted air, for example during or after cooking. This works very well and it amazes me how much the air in the house is polluted by cooking or baking in an open kitchen.
The design of the device is very chic. It certainly doesn't look out of place in the living room and has a luxurious look. What I also like is that you can set the number of degrees within which the Dyson rotates back and forth for the rotation.