Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Disappointing

We've tried several bark deterrent methods with our Sheltie. The vibrating bark collar works best, though with her thick coat it is hard to keep a patch of skin shaved for the close contact over her voicebox it requires, and it is a higher maintenance approach, needing to take the collar on and off (for walks, etc.). So, we have been looking for a more user-friendly, humane, consistent deterrent and hoped this product was it, despite mixed reviews. Unfortnately it was not. We tried it for two weeks before it was evident it was not going to make our dog stop barking. We could tell she detected the sound emitted from the device and even tried to manually "practice" with her associating the sound with her barking, but it never phased her at all, much less make her stop the barking. We returned the device and will continue the search.