Works well to keep a young and mischievous cat off ...
920200
Works well to keep a young and mischievous cat off of the countertops and from jumping up to the top of the refrigerator.  It's an essential tool when dealing with certain cats.
2565318
It, keeps the cats from getting into areas that I don't want them in.  They quickly learn where they can go and you don't have to scold them.
3358380
Bought two to keep "Stealth Kitties" off the counters and they work great although sometimes the kitties are extra determined to get at something. So if it keeps going off you better check. A word of caution, we bought two for two different counter areas and on occasion they set each other off (kind of a vicious circle).  They are that sensitive. Also, the dishwasher will set them off too. Still worth the price as they really did deter the cats. Highly recommend.
4201041
I actually bought this to keep cats off of a convertible car and it works great!  I used to have to take a lint roller to the top of the car and now they don't go near it.
616049
Helps get cat pills down their uncooperative throats.
617126
seems to work well to discourage cord biting at an inexpensive price - not very beautiful - but better than the alternative - dead cats, ruined cords
110350
It's not easy to get it on a 6-month old but once on, it works like a charm although the cat hated it and fought it like crazy!!!
2710367
Works great for containing toddlers, yet allowing cats the run of the house. The only minor problem with it is that the bottom is easy to trip over if you're not paying attention. Otherwise an excellent product.
306621
This has done a superb job in keeping my kitten from tracking litter literally everywhere, and the backing keeps it in place on my hard floor.  But it's done only 2/4 in fending off my kitten's attempts to gnaw off the corners - and I don't think she's done trying.
531932
Works pretty well to keep our cat calm and to stop him from going to the bathroom outside of his box. However, we sometimes need to use the spray as well to get some sleep.
612847
So far it works well with my cat, she has not gotten up on our counters to mess with the plants, which she loves. One negative (not reflected in rating because it is user problems) is that sometimes I forget to turn it off in the am and walk by it a few times triggering it and driving my cat crazy.
535751
Finally!  Something that keeps our cats off the dining room table, counters, and other spots where they were doing things they shouldn't have been doing.  These things really work.  The adjustable power level is a good feature.  The instructions tell you how to test the mat.  It's not dangerous but also not comfortable.  If you try touching the mat, you'll see why it works!  There's a couch version available elsewhere (12" wide x 60" long) in addition to the sizes available here.  The extensions also work great.
2614886
This has done a great job keeping the neighbors many cats off of our deck.  We used to find anywhere from 1-5 cats soaking up the afternoon sun, and we have been cat free for several weeks now.

It covers a decent sized area.  My kids and I can hear the high pitch noise when we walk in front of the sensors, but my husband cannot.  It's not terrible, but we do shut it off if we are outside for a long period of time.  We are using batteries, so it is nice that it shuts off unless something triggers the sensor.  It has held up so far to several rain storms.

We have 1/2 acre surrounded by fields.  I will probably purchase another one at some point to keep the cats out of the garden as well.
1913447
Does what it says even chased away a stray cat
2592563
We got two of these feeders to stop the cats from waking us for food and to feed them if we are late getting home. So far it works like a charm. My only complaint is the tray the cats eat out of easily comes off. I understand it needs to be removable to clean but I wish it locked in or something. Our gentle 5yr old female cat knocked it off so I'm worried about our rambunctious 1 year old rescue. He is like a little bull, haha. Luckily it has a locking lid but I hope it holds up. It just twists to lock so I feel like our little bull will be able to knock it off.
3393729
I ordered this for my son as a way to keep the cat liter on paws from being carried out to the other areas of his house -- it works great!
4220498
I just got it last week to keep my cat pff the Christmas tree. It worked for my 7 month old kitten Claire the first time, but that was it. She was "repelled" the first time for about 2 hours and that was it. It seemed to have cut down her chewing on the Christmas tree for awhile though. She never really lost interest in the tree. Still gets in it even right after I spray.
It should be labeled as a HUMAN repellant as the smell is so strong you will want to get as far away as possible!!!!!!