Works to keep cats off of stuff like counters, or tables. I think it would be somewhat less effective on the floor, getting in your way.
I use it to keep cats off a specific area, my stove top. And it works. Beware this thing is a heat sensor, not a motion sensor. Thus I have to turn it off when I am using the stove till the burners etc. cool down. I had an old version of this that was blue and beeped as well as sprayed. IT could condition the cats to flee when it beeped only, to save propellant. However eventually that one quit working and it is not repairable being that the electronics are tiny and inaccessible. This one is working fine just spraying the compressed air. You can cheat and buy some brands of compressed air cans and remove the plastic tops for this to attach to. That is up to you and the makers cans always work with this, if more expensive. It is an effective deterrent but not over a huge area, like a real long counter top. But you can move it around and keep the cats in doubt as further deterrent. Pointing away towards the back so you don't set it off. IF you just use it when you are away or at night, you have more flexibility.
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