Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not Fort Knox, but is still durable.

If you need a convenient place to keep your valuables, then it's great. The outer shell is durable, but the lock might not be as strong. I'm only saying that because the keys look like stronger and slightly larger versions of those tiny keys that come with children's diaries. The lock is also difficult to use, you have to jiggle the key inside it while turning it to feel it catch on the locking mechanism.