Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Garbage

I bought a 100 stack of these DVD-Rs at Staples because they were on sale. I figured that HP was a good brand name, and it was a good deal. Unfortunately, these discs have about a one-third failure rate when being burned. I've used 20 of them so far, and 7 of them were spit out of the burner as expensive coasters. I've used a few 100-stacks of the Staples and the CompUSA store brand discs and had no problems.