Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Coby cx 144

As of 6/11/08 am on my sixth one of these gems, three of which had to be returned to the Alco store where they were purchased. One would not work on house current. Another buzzed heavily on a.c., giving off an odor of melting plastic. The one exchanged 6/11? The cassette portion went dead-wouldnt rewind, play or record. When these work, the quality is okay, and it is hard to buy a unit like this without an obtrusive cd player. It is too bad these are so unreliable.