Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Worse than no lock at all.

My bicycle was stolen yesterday while I used this lock. It was stolen from a high traffic area in front of tons of people so it must not have take much effort to cut through this lock. Looks like it was a single cut. Like another reviewer said, I will never buy another lock without a theft guarantee. This lock is worse than no lock at all because it gives you a false sense of security.