Instruct: Classify Amazon reviews into positive or negative sentiment
Query: POOR Quality and unreliable

The concept is sensational. The unit performs well, when it works. The ear phones are shameful and the ipod is aided by the purchase of Sony headphones, for example. That's a measure of the attention to detail by Apple. The earphones are tinny and unacceptable. The unit has malfunctioned numerous times and ceased to operate altogether. This has been replaced 3 times, going for 4, and the assistance is always polite, but usually inept. I'd go for a different brand for my portable music in the future.