Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't seem to work well for an iPhone

This item did not lock at all when I tried to use it on my iPhone with the Griffin Clarifi case on it. The bottom opening on that case kept the lock a bit too far out to engage properly. When I removed the case, it kind of grabbed on one side, but not very well, so I'm not clear that it would actually stay locked, given that one side was slipping out easily. It seemed to me that it would just encourage a thief to try to yank it out, resulting in a broken iPhone if not a stolen iPhone.I will be looking for another security solution -- for now I'll leave the iPhone locked in a drawer when I'm not in the office.