Bjorns aren't really good for the mom or baby. The baby basically hangs from the crotch so it isn't great for their hip or spine development. It isn't very comfortable for parents to wear either. I'd recommended a woven wrap or a mei tai baby carrier.
We have it, DH uses it occasionally, pic in siggy is from last week. (I use a Baby K'tan). I think DH likes it but only for short periods, if he goes longer he says his back hurts... 15lbs of baby become heavy after a while.
Re: who has this..Baby Bjorn Synergy Carrier