Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Invisible dog leash is an bad product

I purchased the invisible dog leash for my four year old daughter. I thought she would have a lot of fun walking an invisible dog. The harness for the invisble dog does not have a shape that imitates an invisible dog. I contacted the seller, and he told me that he could not do anything about his poorly made product. He stated: No replacement, no refund. I am highly disapointed with this product and seller.