Biometrics can have reliability issues (as well as dead batteries). Combination safes can be cumbersome in the dark and might be difficult to do under stress. Electronic keypad safes are pretty quick and easy but still have battery issues that might burn you in an emergency. Keyed cabinets require you to protect your children from the key and can be difficult in the dark under stress. The simplex cabinets and pistol boxes are the best option in my opinion.