Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great with one big exception

I purchased this over other cheaper options on various websites thinking it would be a versatile option to tap the line output of my iPod. If you're simply using this with headphones, it works fantastic and I don't believe you'll have the issues I'm having. On the other hand, if you use it with a cable much larger than the white earbuds there's one unfortunate oversight by whoever engineered this product that renders it useless and potentially hazardous to your iPod. First of all it's bulky and relatively heavy, and there's no locking mechanism, so it fits loosely in the iPod interface and it tends to fall out easily and frequently when picking up my iPod. My biggest concern is that it appears to be bending my iPod's interface while connected, which will in turn bend the PCB inside of the iPod and can drastically reduce the life of an iPod as it will eventually cause connections to come loose.