Instruct: Classify the given Amazon review as either positive or negative.
Query: Keep it Cool

The performance of the iRiver AFT-100 was acceptable, especially since I use it only for audio books. The convenience was worth the "only fair" sound quality. However, a few days in a hot car and the Aft-100 was toast!! The outside temp was only about 85 degrees F, but the AFT-100 is dead. Buy it if you want, but be sure to take it out of the car on hot days! (Amazon's price WAS the best I could find.)