I am by no means a sling expert. I have a hug-a-bub and for me, it's brilliant! I have large breasts, had a 9pound 9oz baby and have a bad back and it's been a godsend! I've carried ds2 for 2hrs at a time with no aching at all!

I also have an ergo that a friend lent me that I'm yet to try, still loving my HAB, but keen to try the ergo soon. I've heard really good things about it.

Sorry I can't give you much info but I'm sure one of the 'sling gurus' will be able to answer your questions!