I did a review of the Fort Knox Pistol Box
several years ago and really liked it for its size and especially, its mechanical simplex lock. I had given it two thumbs up, thinking it was an ideal way to keep a home defense pistol away from the kids but still be able to access a gun quickly should the need come.
Well... 5 years later the simplex lock started acting up. It would take multiple attempts of the combination before opening, and recently it got to the point where it would fail to open 9 times out of 10. I ended up tossing the box into the garbage, and would not recommend it to anyone.
As a replacement I bought a Gunvault biometric mvb500. It is lower profile, can still hold my G23 and an extra mag, and opens very fast.