Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good for the first two months...

I purchased this lock for my commuter bicycle in Washington, DC in May. It seemed sturdy, did not have problems with the key breaking off in the lock (like many of its competitors), and was hefty but not too heavy. For the price, it seemed like a great deal in the beginning.Like some reviewers have said, the plastic piece that attaches the lock to the bicycle is not strong enough, so I had to either strap it to my bicycle's back rack or sling it over the handlebars. This was a minor hassle, but no big deal. Unfortunately, this abuse proved to be too much for the lock. Its cheap, internal plastic components must have cracked during one of my commutes, because when I got to work it completely came apart, revealing cracked plastic parts.If this lock cannot handle a few bumps on my 3 mile each way commute for 2 months, I do not trust it to secure my bike!