I have been debating on the Ergo infant insert. My last kiddo was 9lbs 7oz 22 inches at birth. So I'm not sure it would be worth it. I think she got up to 12 pounds by about a month to a month and a half. I've heard a lot of people say you can roll blankets & use that instead of the insert. My question is.... how the heck do you do that? I guess I just can't get a good mental image of it to figure out how I would do it.