Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hit or miss

Seems like this is literally hit or miss. I've owned three of the cx 300 previously and none lasted more than six month, but I always liked the sound and how comfortable they are. This one however, was busted in two days after the usage and I now know the difference clearly between cx 300 and 500. Good thing I ordered both at the same time! 500 is much more durable and has better sound quality. Go with 500.