I’ve been using the Petsafe tall units, but like the low profile and slightly lower price of these smaller units so I tried one. First one arrived with a rusted supply can, but they sent out replacement right away and it works!
I have cats that get on the kitchen counters and I was concerned would eventually burn their paws on the stove. This device works great to change that behavior without any injury to them. I move it around so I only have needed one. A great help for a happy life with cats!