I bought this new Hipster for my son because I am petite and he is large and very for me to carry. I tried the old fashioned sling but my shoulder would go numb. So I get this thing and find it rocks. It is great for multi users and is easy to change size. I just thought I would let anyone who has this carrying problem like mine know there is a product out there for you.
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This thing I have is called the hip hammock by platex if I recall. It cost under $40 Im sure. I LOVE it. I have put this thing to the test! Me and my much taller boyfriend use it. It is easy to adjust size from lil me, 5'4" 108lbs to him 6'1 200lbs. I have worn it hiking in rough woods and my son nursed great in it and slept fine in it too. It wraps around your waist and around one shoulder diagonally. It is comfortable as they can be and requires only one hand to support the baby. Here is a link to see it. I hope this helps!