Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not the greatest

This product didn't seem to work at all, I sent it back. Occassionally it would play all of one song but mostly it locked up on the first song every time, no matter which song it was or which thumb drive I put in. I tried to reformat them, know they worked on the stereo I had before, but to no avail. Then every time I unplugged it it would start again on the same song and lock up again. Seems to be a very unreliable product.