Rocnerd, I also feel more comfortable when the safe has a mechanical lock, either primary or secondary.
I use a Sentry safe, slightly larger than most of their models, even though they said not to store firearms. Not sure why, but maybe it is because of possible moisture damage, or perhaps they just don't want to get into firearms lawsuits.
For quick storage, I sometimes use the Life Jacket case for the always loaded pistol. Certainly a thief could walk away with it, but guests and kids would be protected from themselves. Normally, children are never here, except my two grandkids, in which case the pistol is in the large safe.
When I was a very young boy, my cousin and I were playing in the closet with my Dad's "unloaded" .22 rifle. I did some dangerous pointing which could have caused a fatal discharge.
At the last second, I remembered my father saying to always check a gun. It was loaded, and a disaster was averted. Even after all these years, I still shudder to think about it.
It was a distant time and place where safes were uncommon. A previous warning from my Dad , plus pure blind luck, saved the day for an immature boy.