i am just starting to learn about guns. taking my ccw class next weekend, i havent purchased a gun yet.(looking at a Glock 19 ) . my wife and my big concern is being safe while my grandkids are around 1-1/2 , 2-1/2, 7, years old...looking at biometric gun safes on the internet...tell me about them, what do i need to look for ... is this a good deal for me so that the gun is still accessible quickly if i do need it. thanks