Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It works for a couple months, then the left side goes...

I bought this product 2 times, it always lasts a couple months and then slowly but consistently the left channel starts cutting out until its completely inaccessible.I would buy the grado model (I have 325is's so they would match) but the 1/8" jack side is too thick to use with my cellphone case.