We have an Ergo and an Over the Shoulder Baby Holder. Both are awesome! The Ergo is what baby and I prefer, but the sling is really great for when I need to nurse while walking around or even doing something with a hand. I wore the sling when we went to LA to visit family and my sister-in-law had all these groupons and free passes for touristy stuff so we spend a day in Hollywood being tourists and we were rushing around between events, but I just nursed all the while! I'd like to get a front facing carrier eventually, so that baby can look around better. My wife seems to prefer the sling we got from 7slings. It fits her well. Don't have a pic of that one, unfortunately.
Hiked to Lake Michigan in the Ergo:
Walking around LA with sister-in-law and spazzy cousin:
Nursing in the Over-the-Shoulder at the Hollywood Wax Museum, lol.