We've used our kit on a few occasions, nearly all to help others, for example, in one campsite a child experienced a burn from a camp stove; the parents had no kit, and we were able to treat the burn with ours. So far, nothing really serious.This is kind of what I am getting at.
In all honesty, how many people have ACTUALLY used their kit for something other than a Band-Aid, tweezers or trauma sheers to open a challenging plastic bag for dinner?
Now I am not dismissing be prepared. But at times, being overprepared is of far greater detriment, especially with people who have no to little training, jumping into a $800 "medical kit" to help someone. If it doesn't have an IV, fluids, sutures, IV meds, then what kind of self repairs are people providing to themselves out there?
Wherever you put it, it needs to be visible immediately, preferably from outside. There's not much point in having a first aid kit if you're unconscious and the good samaritans who could save you don't know where it is (or even that there is one).