Good, but not better than sliced bread
I am giving it 4 stars. It is built well, can rotate, etc. However I am sure it is killing germs, but to be honest I can't tell a dang difference in any smells or general air quality. We have two litter boxes and at first I was like &#34;yeah this thing is awesome, look at this technology it's amazing!!!!!&#34; Then I realized normal cleaning and whatnot kills the odor from litter boxes anyway. So bottom line, I'm sure it does kill germs, as far as odor goes, unless you are a very lazy person who doesn't clean you might notice a difference, but if you are relatively clean you won't. I've had this thing for I dunno around 6 months now or so.<br /><br />Hope this helps
Rating: 4 stars