Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Junk

These failed me completely! In the first few days I went to unlock them and the one cuff on the frame would not unlock with either key. So....I had to go to a locksmith. After opening it we reattached the cuffs to the bike and the other side "froze" but this time after trying to pick it....no luck, so it had to be cut. After many phone calls to Masterlock, I was finally able to get a refund but it was a hassle!