Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Okay normally, mine was defective

This seems like a fine lock for the price, but mine was defective - the locking mechanism now spins around and doesn't open. I like the fact that it came with four keys, but it is a little annoying that there is no physical sign for the top and the bottom of the key given that there is a right side up when you insert the key. I ended up cutting the plastic key body and marking the keyhole so I knew where the top and bottom were and I didn't have to fumble to get it in. Also, the thing to attach the lock to your bike is incredibly poorly designed. There is essentially no way to attach it without it getting in the way of your legs when you bike, at least with my 30 year old road bike. Maybe with modern bikes with fat tubing it would work better. I like the velcro strap that is there to keep it together and the fact that you can insert the end into the lock and it will lock without having the key inserted.