I really like mine. It's good for hiking or taking walks or shopping- I couldn't use the sling for that since it pulled on my neck and shoulders after a while. And the framed backpacks are very uncomfortable for me for walking. I found the Ergo to be very comfortable and much easier on the shoulders, and once you get the feel of how to put the baby in it, it's really easy. You can also use it on the front like a baby bjorn (with the kid facing your chest)- although I never used it that way, lots of people do. For back carrying you can't use it till they can hold their heads up, but I would imagine using it on the front you can do it much sooner.