Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor Quality Control?

I purchased a quantity of 5 of these cables. I was disappointed to find that each of them performed poorly on every device I connected them to. This isn't the first time i've purchased discount HDMI cables on amazon either, so I felt like i knew what I was getting myself into. I tested on an xbox 360 and a Mac Mini 2011 model both connected to a 32'' LCD tv, and a separate monitor. Both devices performed as expected with a known good hdmi cable but had numerous display problems on these cables. These problems included artifacting, blurring, the screen making strange color combinations and showing scan line like behavior. I tried each cable in succession and found each one to be defective, no big deal they were cheap. I didn't see that a lot of other people were experiencing issues with these either so it may have just been a bad batch didn't make it through quality control