I've run this little air purifier in my home office for the past few week.   My home office is downstairs, without terrific ventilation, so I liked the idea of removing particulates from the air I breathe while I work.  

The air purifier is very space-efficient and looks nice on my desk.   It charges well and will run for a workday if you need something cordless.   I had an extra cellphone charger and in the end I just left it plugged in.

It's very quiet -- imagine the sound made by a laptop fan.  My office was almost too quiet, and I found the gentle "purr" to be an unexpected benefit -- it drew my attention away from little outdoor sounds that might have distracted me.  (Same principle as a white-noise machine I suppose.)

All in all a nice little portable air purifier!  I was pleased.