Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Not that Great

I bought this product to replace my broken Zune ear buds. When I received the product, I found that there are small easily losable rubber ends that change the size. None of these fit well, and with light movement they always fall out. The benefit of this product is that it does a rather decent job of reducing outside noise (In is not designed to block out noise completely). Another issue that I have had with this product is that after about a week of use, I noticed that one of the buds was playing significantly louder than the other one. This was not a very good purchase.