I have 5 kids also and agree they were all VERY different. However, the crib was in my room next to where I slept. Its hard to explain to people the "different" kind of cries a baby has...of course I was always a paranoid mom and always checked when they were crying. I was lucky though in the fact that mine were sleeping through the night at a quite early age. A very young baby I wouldnt let cry themselves to sleep but maybe if they were older. It depends on the situation.