Also keep in mind what you put in it. My aunt had a fire safe and kept anything she had of value in it. (for a buisness) The place caught fire in the big california fires a couple years ago. She finds the safe in the rubble and for the most part it look good. She thinking, thank GOD. Opens the thing up and finds a giant melted mess. The safe did it's job, kept the stuff from burning up, but what she didn't know, was that nearly all of them are only designed to keep things under their flash point. The back up tapes she had for her server were in there as well as archived video tapes from the survellance. They didn't catch fire, but they did melt into a giant puddle with all her important papers (not burnt) mixed into the pile. It was also in the fire much longer then what they cover (I think it is like a few hours or something) but you get the idea.
She didn't learn this until she tried to get the safe warranty and they do state something along this effect.
But, I have a few Sentry safes, and they are great. A break in at one of my sites had been recorded and they were hitting the locks with hammers and a chisel and ould get in. The keys still even opened up fine and we didn't even have to call a locksmith to come out.