Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Low quality

I had to send these back after 3 days. The lock sticks after cutting each and every nail, very time consuming. Talked to the prez of Martha's Pet Place, he said Vista Series is the low-end of Miller Forges products, if your bent on getting Miller Forge, get their double-duck or red ones. They are better quality. I don't know why they continue to sell the vista series. I traded them for "safari's" and I deem them the best!!