for the first 5 months or so Veronica slept in a bassinet in our room, then a crib in the next room, and I slung her all day, she slept great..through the night mostly after 2 months, even though she was completely breastfed.
But after almost 6 months I couldnt stand it anymore, and we moved her in bed with us...we've been oh so happy ever since!
I dont think it was her as much as me that needed her nearer ALL the time. now I wouldnt have it any other way...convincing dh was the prob all along...what's with some guys? lol
so my point is, I never had a problem with my baby not napping or sleeping without me after being with me all day in the sling (and she was ALWAYS in the sling, her first ride in a stroller was at 5 months, and its only been about 3 times since then...MIL
but all babys temperments/personalitys are different.....I am soooo glad mine loves her sling!
just an example for you! i am sure others will have more insight.