It helps a little, but not worth the price.
Works well enough for me.  I use it in my bedroom where the litter box is (the only place my 18 year old kitty will go)  I would be woke up in the middle of the night with the odor of her elimination. Since I got this, the odor has not woken me up.  There is still an odor, but not as overwhelming.  Other people say it is noisy.  I find the sound low enough to not disturb me, and the light does not bother me either.  The socket is lower on the wall and below my direct eyesight when in bed.  Perhaps that helps.
Rating: 4 stars