I have an air quality meter going in my basement where I have this air cleaner. I fired it up and left it sit for about half an hour to give it a chance to work. It took particulates down a good 10% in the 2.5 and 10 micron ranges in that time period.
Power consumption according to the panel is 54 watts, so less than a 60 watt light bulb (less on lower speeds I'm sure).
What helps add value to this air purifier is the use of standard (and very easy to change, by the way) H13 filters. There are LOTS of these available, and they seem to range in price from $15-$30 each (except for the Elechomes branded ones which are about $50), roughly, with savings to be found in multi-pack purchases, as is typically the case.
The setup and operation is super-simple, with a very responsive touch screen, and button presses are acknowledged with a cute little "chime" sound. It has LED lights which change color from green to yellow to red if the air quality drops, and if you have it set to auto, it'll ramp up the filtration speed if it detects "dirty air". It also shows the approximate ppm of the PM2.5 (2.5 micron particulate matter) which responds in real time to changes in air quality. A very nice feature.
Operation is fairly quiet (not so much on high, but still not unbearable), but you'll find it most pleasant at night on low or medium, unless you're one of those folks that enjoys some noise going while they sleep. Of course a timer is also available (I never turn my air purifiers off, personally).
The only thing I took a star off for is it is a little "plastic-y", If you have little ones running around, you may want to keep this out of reach, because I'm not certain how well it could survive being knocked over.
I think the functionality of this air purifier and wide availability of inexpensive filters (which are very easy to swap out) make it a very solid value, and if you're looking to improve your air quality, this is a fine way to go.