I have 2 carriers, and a borrowed sling. Personally, I only like one of them, which is the Baby Bjorn carrier. It's really easy to bubs in and out of, and doesn't put a lot of strain on my back. The cheaper version is absolutely what I paid for - cheap and nasty. By the time I was finished strapping Annika in, she was grizzly and ready to hop out again. The sling was good for when she was younger, but I always worried about her poor neck and back. It is shaped in such a way that bubs can't roll out, but I always worried about doing anything to energetic, just in case. I feel that the carrier has a lot more support, and just gives me piece of mind. Hope this helps!