I have a kanga which I never really used with DD--I bought it for another friend when my DD was older, but my friend ended up not wanting it--anyway. I thought it might work really well for my friend with the shoulder problem, since you can put the baby on your back without having anything over your shoulders. But as far as I can tell, you have to tie it over your shoulder in order to put the baby in front. Is there any carrier that works similarly to a kanga, where you can carry the baby in front without anything over your shoulders?
I'm going to let her borrow my Moby as well, of course, but I just wanted to know if there's something I'm missing that might work better. Any ideas?