My babies were/are in the happy group of those who hate the cradle position! So our pouch and r/s aren't useful til they can support their weight quite well and are closer to sitting.
So Si's been in the Pikkolo (similar type of carrier to Ergo, but not needing the infant insert) or a Mei Tai from birth. I love my Mei Tais (yes, it's plural), find them fantastic for newies, and if you end up with a bub like mine who demand to be carried upright, then they're amazing.

Just thought I'd share that, cos I love my pouch and ring sling, but they're not much use to people with newborns who hate lying down! :P (unless you can manoeuvre them into secure upright positions, but I never could...)