It is rated U.L. 2, so one like it hase been test be the Underwriters Laboratory to keep the contents under 300 degrees for at least 2 hours while being blasted with 1,700 degree blow torches on its entire surface. The average house fire is about 350 degrees. So it should be good.

The TL-15 rating means a team of locksmiths could not get into it within 15 minutes using standard locksmith tools. I imagine thieves would take longer since they have to get the tools ready and aren't as capable as locksmiths, at least not the ones that would be robbing a middle class man living in a single bedroom apartment.