5 kids and under the age of seven and 2y.o. triplets...my goodness bless your soul....i had a mono 30 but sold it because it hurt my arm when i held it near the elbow. probably too overstuffed! i have the 40 as a travel bag, but i prefer my shoulder bags. they are easier to handle if you carry alot of stuff and need your hands free. i have 5 kids (ages 7, 3, and 2 y.o triplets) and i NEED my hands to keep them near me.