Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Tough Impulse Buy

I purchased these on a Black Friday Week Deal. Thought it was a great buy, but you get what you pay for. Fuzzy images, and impossible to focus above about 15x. Just wish I had read all the reviews before jumping at an inferior product. My 30-year-old Bushnells are a much better product. I will never buy another Barska product. Avoid.