Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Same as Etymotic Research ER-6

This is a pair of Etymotic Research ER-6 in a different brand and packaging. I got mine from eBay, much cheaper than what one would normally pay for ER-6, but after a few months of usage, I had some noise problem. I called in Etymotic, and they gave me an RMA, got it serviced quickly.The design of the case differs somewhat, but as long as you get the same super-quality earphones and good services that one would expect from ER-6, I know you'd be pleased.