Although constantly re-sorting and stocking any BOB is a bit of a pain it does allow it to be regularly checked/used/tested and run through its paces before being used in any "real" emergency. I'm a big fan of being familiar with your equipment although i've yet to design a test that simulates the stressors of an emergency (not sure I want to!) and how it works or indeed how you work it.

I always take my BOB out when camping/bushcrafting and use most of the elements when I can. Generally the thing missing for me are the knots I recently learnt and no matter how much I tell myself to practice it seems its the first thing that i forget to do!

ATB
Moab