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

First let me say Amazon's customer service was amazingly GREAT! The monocular was just what I wanted.The problem was a bit of what appeared to be part of an insect wing floating in the eyepiece which would interupt you ability to see frequently. I sent it back and the replacement had the same problem. The second monocular was replaced with a 3rd with the same problem. Since all 3 had floating pieces of different shapes, Amazon concluded that it was a batch problem. Their refund of my money was fast and courteous as was each replacement. While the product was defective, you know you are safe spending money with Amazon and that you satisfaction is assured. GO AMAZON!