My grand baby is 4 months old! They are the grand! I keep him during the day and when we go shopping I have a smaller car seat for toting him and sitting in a cart. I keep it in the trunk as his safety car seat sits on a base in the seat and is much heavier for me to carry in and out. So far the smaller seat has been better then the cart cover. DD was given a cover at her baby shower so it may come in handy as he gets older. I never used one with my kids so don't know how helpful it will be to use.