Is there a point where it's not an issue anymore? Is it just when they're newborn?
My SIL gave me her old Bjorn -like 7 years old- and M is now 3.5months old. Wondering if it'll be OK to use it? My husband really likes it.

I was thinking of buying a ErgoBaby but if we don't have to spend the money it would be great.

Thoughts?