Baby carriers?

So I have somehow ended up with a million different types of baby carriers. I have a sling, a moby wrap, an ergo, and a bjorn! I plan to keep the sling since I think it will be good, especially with breastfeeding, in the first few weeks. Otherwise though I feel like I don't need all three of the others! Does anyone have any ideas or thoughts on what they like best? I've heard mixed reviews on all of them!