Puberty: Infantino

Baby Sling....Ring, Pouch or Neither??

I am researching baby carriers. I have looked at baby slings with rings, pouches, wraps and framed carriers. I have tried the framed carries and backpacks with the other two kids but they were uncomfortable. A friend told me that if I wanted to have a sling I needed to get "sized" before I got too far in the pregnancy. Does anyone have good or bad experiences with slings? God Bless, K.