Instruct: Classify an Amazon review as either positive or negative.
Query: Mind of its own

Was given one of these for my laptop at work. Seemed OK, so I got one for my daughter to use at school and we set and tested the combination before she left.When she got the lock on, the same combination was suddenly not working to get it open so I had to take a hacksaw to it during a campus visit.Now the same thing has just happened to the one I have at work. Fortunately it happened when I was trying to put it on.These phantom combination resets make the product very unreliable.