Get this if you have cats
I plugged this in next to my cat's litter boxes.  It works very well at reducing the odor.  Of course it isn't a panacea.  I still have to scoop the boxes daily, but it works much better than anything else I've tried, and it is far better than trying to cover up the odors with air freshener.  I definitely recommend it if you have cats.
Rating: 4 stars