I have the baby bjorn......its only really good for little babies. Even then u get a sore back after a while. Sometimes i still try to squeeze bodhi in it( he is like 9.5kg....i think that must be its max weight) & after a short while i'm out of breath & my back is killing me. It doest offer alot of support. To be honest i'm thinking about getting a HAB for him. Iv heard its comfy & gives alot of support for ur back. I'm not sure of the ages & weight for it tho???