Instruct: Classify a review into positive or negative sentiment.
Query: A very good piece.

I've own several earphones and I'm still impressed with the sound quality of ER6i and the noise reduction. The several other earphones also claim noise reduction, but do not come close to ER6i. It's small and it fits well to the ears. I just wish they build this to hold up more physical abuses since I'd want to take it with me everywhere.