Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very poor quality and zero customer service response

First impressions were good - very small and excellent sound. Isolation rivals some more active systems I could mow the lawn and listen to awesome sound with just a faint rumble in the background. After about 1 month of light use the flexible plastic at the jack split. 2 months later the jack was hanging lose from a completely split joint. Managed to limp by on this for about a year, wires finally shorted and now dead to the world. These were great while they lasted. Got a sum total of ZERO response from customer service, I will never buy from them again.