Yup, same here. Cabled to the seat. Pair of heavy cutters and it's gone or decent screwdriver to pop it. But it means that I'm NOT leaving an improperly stored loaded firearm when I run into the post office.
On the plus side, it's in my locked/alarmed truck, out of sight. The TRUCK is what's keeping it safe, not the stupid little micro-vault. The micro-vault is keeping me safe from the law.