I hadn't thought about using that carry with my LO. She is almost 4 months but only weighs 9 1/2 pounds so it's like having a newborn.
I usually use the cradle in my pouch sling with her. I have used it since she was about a month and half. I am going to try a moby wrap with her. I will let you know how that turns out. She still doesn't hold her head up good and so I am having to be careful trying what would work for a normal 4 month old. She was born a month early. But, we are making all kinds of progress that we weren't expecting until later! She is growing so fast! Guess I will just have to have another one.