Didn't work well for us
584038
It didn't work well for us, but returning it was very easy.  It only worked right around it and we needed it to work farther away.
3371027
It did not meet our needs.  In theory it was great but the beeps were inconsistent and my dog was freaking out every time it heard the beeps and then eventually ignored them as we were training as the manual stated (without shock).  I so wanted this to work but it did not suit our needs so we returned it.
3968830
Unfortunately, this item didn't work out for our dog. He just never got hang of what he was supposed to do. I even tried putting peanut butter on it so he could hear the ringing tone when he licked it, but he never seemed to connect the tone with wanting to come inside. Also, it would ring on its own, sometimes in the middle of the night when there wasn't a critter in sight. I gave it a 3 star rating for the quality of the construction of the device, and the large number of melodies and sounds it could make. Also, because I contacted the vendor for suggestions and they sent me a refund. Hope it works well for others.
913550
We weren't able to make it work very well. It might be that we are just too used to the usual corkscrew.
3748561
I know this product has worked for many people, but it was not helpful with our cat. She had occasionally been urinating on the carpet or on furniture after we moved into a new house. After buying the diffuser her marking behavior increased dramatically in the room with the diffuser. We have removed it now and are having the carpets cleaned in that room. Had to throw away several items that she ruined. Very disappointed.
239910
We just could not get this to work. We tried several pasta recipes and it just didn't work like we expected.

Pasta came out really sticky. Dense.
3006719
This product was recommended by a veterinarian friend of the family because we are having some trouble getting our older cat adjusted to our new kitten.  I've used the diffuser for two months and the comfort zone spray in some at common areas.  I wish this product would have worked....but it did not.  Our established cat has morphed into the ultimate version of "grumpy cat" sine the new kitten came on scene.  She's quite headstrong, and I suspect that we're going to need some professional help. This product was easy to use, and it was worth a try.  I suspect this might work for a more easy going cat.
4184610
Our friends used this and we thought their baby was a smart as a whip. Unfortunately, after several weeks of "lessons" the machine crapped out and the lesson (rhythmic beats and thumps) turned into a scratchy earache. Comparing to our friends machine, we knew we had a dud. Since we had been using it for several weeks and the  product is baby related, baby plus was unable/unwilling to help. However, Amazon stepped in and accepted the return for customer satisfaction.
1403168
We never could get it to work properly. We would test it and it would work , then when we put it on the dog it didn't work.
4864712
Didn't work for us
We have 4 germen shepherd s and didn't work on one of them. She just kept barking and the other 3 went in hiding from the noise.
214194
This thing didn't work for us. It got triggered more by music, TV or general talking than any barking. The dogs went nuts one night because there was music playing and we had no idea it was triggering the device. It seems to be overly sensitive to all noises but barking. I wouldn't buy it. We returned it as soon as we found out it was going off non stop to the music.
1754804
This product did not work for us. It kept sliding off of me and my daughter's arms while working out, It is a great size but just didn't stay on, no matter how much we tightened it. It seems to be made from good material, it just didn't work for us.
1987657
We did not like the way this functioned, you have to continually squeeze to keep the water in the bowl. After two uses, the water no longer stayed in the bowl regardless of the amount/duration of the squeeze.
3070970
Tried to this on our hyperactive Corgi for several weeks and it seemed to have no difference on her behavior. We followed the directions on dosage, but it didn't seem to calm her, unfortunately. Every dog is different of course but for our dog this did not work.
2079817
This product did not work out well for us. It did not end up being the keepsake I had hoped. Not sure if we were missing some tips or tricks but the paw print would not show up and as of a week later the "clay" still has not dried hard! Hope it works better for others!
1632502
We like a firm bed but this one just did not work for us. We used it for two months and gave up. It was hurting our backs.
18484
The idea was good but did not work for us
.  We don't get cell phone service here and hoped that this would work but did not.