Everytime I see something on gun trigger locks, I'm always a little nonplussed.  I would never lock a medical kit, so why do we lock guns?  If you are genuinely in a situation of medical emergency, seconds mean the difference between life and death, and just the same, if I am in a situation where I must use the lethal force of a defensive sidearm to defend myself, seconds are just as important.  Even the quickest trigger lock is going to set you back more than enough time for you to be fatally injured.  I guess with say, sporting rifles, there may be a bit more need for something like that, but in the case of a firearm used less frequently than a defensive carry, a gun safe or locked gun case is a much better bet, especially since gun cases generally have harder to pick cylinders than a trigger lock (and you cant pry those off a gun whereas you can most trigger locks)