We are using this product and it does seem to be working. Since our kittens only go on the kitchen counters after everyone is sleeping it's going to take some time to be sure. My one pet peeve is that you don't seem to be able to buy refill canisters, you have to purchase the whole thing. An environmental waste in this day and age. I think the addition, a citrus or citronella scent would be an additional reinforcement as well. I have only found this product at a local pet store and it was twice the price, plus taxes. That's too much for a bit of plastic and a small can of pressurized air. Although we could really use another 4 of these, even at $ 30, that's just too expensive for today's economy.
I gave this product 4 stars because it 's very easy to use, and it seems to work and it is portable. I wish we could buy refills, because 1 little can won't be enough to cover the off limits area in our house.