We used the Ergo baby a TON with DD1, starting at about 6 months. I understand that it can be used with an infant/newborn if you use the infant insert. Now Ergo has introduced a new "heart to heart" insert. I'm wondering if anyone has used this, and if it is recommended over the old flat insert? Here are the two styles: http://www.ergobabycarriers.com/baby...infant_insert/
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