Instruct: Classify Amazon reviews into positive or negative sentiment
Query: MP3 CDRW playback lacking

Tried this in a store with two ordinary MP3 CDRWs (both burned at 4x speed). Neither was recognized as an MP3 CDRW - the unit just sat there, mute.(Playing back MP3 CDRWs is pretty much all that I would do with a unit like this, so I didn't test the other functions very much. The radio seemed to work well.)The search for a boombox that works as well as the Rio Volt line of personal players moves on...