Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Please recall this MP3

My son's stopped working within a month of purchase. We looked online to see if others have had the same problem. It turns out that this model was defective, but the company is still selling it. One buyer had to return their MP3 player 3 times before he got one that wasnt defective. We've also had to return ours. It's hit or miss so research first...before you buy.