Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Does not work with iAudio 9

And I seriously doubt it works with many other COWON products. I have both the plastic case and the carrying case for the iaudio 9. The only way that either could work with the armband is if the plastic flap of the armband could be threaded over the back of the case. This is not possible with either case. The Gee Bee armband for iaudio 9 works so-so.