Buying Diapers first before delivery?

It's always good to be well prepared and no harm getting the Pampers early. As for me, I got it after baby is born (always a last min person) and it's also fine as long the Pampers that hospital provides are sufficient for your baby (I managed to bring home 1 extra pack that was paid for in the discharged bill). Personally I like the brand "Pampers" as I felt it has great absorbent.