We bought an Ergo for Daniel when he was literally, 6 days old. I bought the infant insert and it was quite warm, considering he was a summer baby, so we didn't wear him in that very often. I had a Moby and I'd use that, but I found the Moby to be cumbersome. I really prefer the convenience of the Ergo, just wearing it around my hips and snaping it up when he's ready to be worn. Unfortunately, I haven't been super happy with it. Daniel is 17lbs and 28 inches at 9 months old and I thought by now he'd be more comfortable in the Ergo without the insert, but he seems to be really far down in the Ergo. Like, the top of the Ergo is just under his head when his tush is seated in the carrier. Because of this, he can't really see out and he really hates it. He doesn't love it any better on my back, though I've only done it once and he was already cranky. Has anyone else had this problem of their baby not really fitting in the Ergo well?