I was told by a salesman from another store that this stroller has amazing safety rating and by adding this piece, you have extra piece of mind

This is very helpful for smaller babies once you get them out of the bassinet or carseat. it is on the thin side, but you don't want it too bulky

I am not sure how helpful the insert is. It is pretty thin. I do not feel like it provides that much support for an infant like the infant inserts in the carseat do.