Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great sound - two CD players were received defective

I have received 2 complete stereos systems and both arrived with non-functioning CD changers. The first CD changer at least played Disc 1 but the second CD changer plays no discs and will not release the 3 CDs that I put in it. I will have to go to a service center just to get the CDs out before I return the unit. Furthermore, this unit is fairly expensive and the FM antenna shipped with it is a simple wire without a connector. They expect you to buy an adaptor or another antenna. However, the sound is great.