When I was in the jewelry business some of the safes we used were extremely difficult to bust open. It would take two guys that specialize in opening safes a couple days using tools specifically made for the job. That kind of safe is VERY expensive. A typical gun safe is not going to stand up to any real effort to open it by someone that with some good tools. The highly skilled professional thief is mostly a myth. The vast majority of people trying to steal guns are junkies and other assorted idiots that have no chance of getting into even a cheap gun safe. The safes out there are far from perfect, but they are suitable for most of the threats that you are likely to encounter.