I have a baby bjorn, a ring sling and now an ergo. I really liked the BB for when DD was about 2 - 5 months old, then it became a bit heavy on my shoulders but in fairness I don't know if that was because of DD's increasing weight or my increasing belly with this pregnancy! The ring sling was great when she was a teeny girl - supported her and held her nice and cozy.

I've only recently got the ergo and even with a huge belly it is soooooo comfortable to use, and Iz seems to love it. I've got the infant insert so I can use it with my new baby too.