Well, Gary makes all great points and I agree with them. While my views on the subject are very close to his, I do realize that people are people and want what they want. Deep concealment is a compromise in more regards than gun access, presentation time and so on. You want a smaller/thinner/lighter gun, less ammo and grip size is typical and so on.
There are some rules I follow for carrying a gun.
First, "have one", never bring a knife to a gun fight.
Second, train, train and train more...if you carry tucked in, you had damn well better be good at it! Your life may depend on it!
Third, get good stuff...weapon, leather, knife, light etc....do skimp on what counts the most......
Forth, shoot the thing all of the time, this isnt training..you can take classes and practice draw until your arm falls off, but if you cant shoot your gun well...what is the point in having it. And so on.
Shoot well and God Bless