we didn't
first of all because the meconium stains the nappies, and also because the hospital typically gives you a pack of sposies. though we hardly ever (pretty much never) use sposies, it's good to have one pack in each size. you never know if you're going to come down with the flu and be unable to wash, or if you end up having to go somewhere for an extended period of time and be unable to wash, etc.
we liked the free backup package. plus newborns are teeeeny and you might not find yours fitting in the cloth diaps (we did NOT have that problem, personally). <3 good luck!