Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Pretty Durable

I have been using this particular U-Lock for about a month+ now. I would ride my bike down to my gym and lock it outside; nothing has ever happen to my bike. I'm happy so far, the key mechanism is also very easy. Just as long as you don't use force on the on key, it should last a long time. It's not as heavy like some other u-locks out there, but it's just as durable.It also comes with a lock attacher which is quite handy, you can attach your lock to your bike in other words :)