Originally Posted by
TGS
100% go with a Simplex style lock from V-Line, ShotLock, AMSEC or Ft Knox for all the aforementioned reasons.
Simplex locks will eventually go out of order just like a revolver goes out of time, but it's generally not something that happens spontaneously without warning. You'll feel the buttons start to stick and whatnot before it actually fails you, which is your warning to get it serviced. Electronics, on the other hand, are great until they're not, and fail without warning.