Instruct: Classify a given review into positive or negative sentiment.
Query: Best I've had!

When I saw the price, I was a little skeptical about the quality of the product. These little guys though are powerful.It is important to note that they do not filter sound. You can still hear outside sounds, albeit muted, and sound will bleed through so others can and will hear what you're listening too, they are not meant to be used in an area such as a subway or bus.If you're looking for something to listen to music, or do some recording with (voice or instrument), these guys are great. Otherwise these may not be what you're looking for.