Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not happy!

These are NOT worth the money. The dogs had them off VERY quickly, and even after tightening, they tore the front seam off within 10 minutes, making them pointless.It took a LONG time to get the package in, and when it finally arrived, the envelope was so small that the contents were spilling out and the flap was opened.